1.The Bible was also used to free slaves and end slavery as well...
2.The Koran also prohibits slavery....
3.The problems aren't with the books, it's really the people who interpret them.
I am bored as fukk so I will play along......
As to your first point, the bible does not specifically condemn the practice of slavery. Actually researching the subject would prove quite differently - the following quotes prove to be such ;
Exodus Chapter 21, verse 1:
Now these are the ordinances which you shall set before them. When you buy a Hebrew slave, he shall serve six years, and in the seventh he shall go out free, for nothing. If he comes in single, he shall go out single; if he comes in married, then his wife shall go out with him. If his master gives him a wife and she bears him sons or daughters, the wife and her children shall be her master's and he shall go out alone. But if the slave plainly says, 'I love my master, my wife, and my children; I will not go out free,' then his master shall bring him to God, and he shall bring him to the door or the doorpost; and his master shall bore his ear through with an awl; and he shall serve him for life.
Here the bible describes what condition may subject be a slave for life, and the text shows that it is completely acceptable to break up families. It also shows that it is completely acceptable to in-slave both women and children
Exodus Chapter 21, verse 20:
If a man beats his male or female slave with a rod and the slave dies as a direct result, he must be punished, but he is not to be punished if the slave gets up after a day or two, since the slave is his property.
Not only does the bible condone slavery in this case, the bible makes it completely acceptable to beat an human being so long as you do not kill them.
Leviticus Chapter 25, verse 44:
Your male and female slaves are to come from the nations around you; from them you may buy slaves. You may also buy some of the temporary residents living among you and members of their clans born in your country, and they will become your property. You can will them to your children as inherited property and can make them slaves for life, but you must not rule over your fellow Israelites ruthlessly.
The bible permits where you got your slaves, regardless the destruction that would happen to the communities that those slaves came from or the slaves themselves. It also says that you can enslave refugees that live in your community.The bible gives you permission to pass on the enslaved human beings as 'inherited property' and make them slaves for life
Luke, Chapter 7, verse 2:
Now a centurion had a slave who was dear to him, who was sick and at the point of death. When he heard of Jesus, he sent to him elders of the Jews, asking him to come and heal his slave. And when they came to Jesus, they besought him earnestly, saying, "He is worthy to have you do this for him, for he loves our nation, and he built us our synagogue." And Jesus went with them. When he was not far from the house, the centurion sent friends to him, saying to him, "Lord, do not trouble yourself, for I am not worthy to have you come under my roof; therefore I did not presume to come to you. But say the word, and let my servant be healed. For I am a man set under authority, with soldiers under me: and I say to one, 'Go,' and he goes; and to another, 'Come,' and he comes; and to my slave, 'Do this,' and he does it." When Jesus heard this he marveled at him, and turned and said to the multitude that followed him, "I tell you, not even in Israel have I found such faith." And when those who had been sent returned to the house, they found the slave well.
Jesus shows that he is completely comfortable with the concept of slavery. Jesus heals the slave without any thought of freeing the slave or admonishing the slave's owner.
Colossians, chapter 3, verse 22:
Slaves, obey in everything those who are your earthly masters, not with eyeservice, as men-pleasers, but in singleness of heart, fearing the Lord. Whatever your task, work heartily...
Jesus shows that he is in complete acceptance of a slave's position, and encourages slaves to work hard. This sentiment is repeated in Titus, chapter 2 verse 9:
Bid slaves to be submissive to their masters and to give satisfaction in every respect; they are not to be refractory, nor to pilfer, but to show entire and true fidelity.
The Southern Evangelical pro-slavery defenders always placed emphasis upon a literal reading of the Bible which represented the mind and will of God himself. Slaveholding , as you can read for yourself from the text pulled above , was not only justified but also moral because it of plenty of evidence that support it in the bible. In God's Word, the "creator of the universe" states that slavery is perfectly acceptable. Beating your slaves is fine. Enslaving children is fine. Separating slave families is fine.
You second point is also inaccurate to say the very least- the Quran did not prohibit slavery, but accepted the pre-islamic institution of slavery. Proof for this statement can be seen in the following verse from the Quran;
33.50
Sahih International
O Prophet, indeed We have made lawful to you your wives to whom you have given their due compensation and those your right hand possesses from what Allah has returned to you [of captives] and the daughters of your paternal uncles and the daughters of your paternal aunts and the daughters of your maternal uncles and the daughters of your maternal aunts who emigrated with you and a believing woman if she gives herself to the Prophet [and] if the Prophet wishes to marry her, [this is] only for you, excluding the [other] believers. We certainly know what We have made obligatory upon them concerning their wives and those their right hands possess, [but this is for you] in order that there will be upon you no discomfort. And ever is Allah Forgiving and Merciful.
The verse above represent in the Quran the multiple references to slaves, slave women, and slave concubinage. It may be noted that the word 'abd' (slave) is rarely used, being more commonly replaced by some periphrasis such as
ma malakat aymanukum ("that which your right hands own"). Islam , as you can see did was not 'prohibited' as you falsely put it , but embraced the age-old practice with open arms and gave it a divine validation. It is groundless to claim that Islam closed the door to slavery or took the first step toward its abolition. In the Quran, 'Allah' repeatedly gave approval of slavery as part of His divine plan, which must stand until the end of the world.
And finally, to address your last statement, can I ask you the the following question;
What do you think the 'persons' ,be it colonial imperialist or jihadist , use to justify their actions , no matter how obscene?
The answer is whatever at hand that supports their ideology. It doesn't matter if its the constitution or the Kuran , there lurks a Torquemada behind any doctrine, able to commit whatever crime they want because 'god told them so'. So what I ask you , what good is any doctrine interpretation if that very same doctrine not only inspires obscenity but has the obscenity printed literally in its pages. Consider the Kuran again on the subject slavery-from the quotes that I have given, you can see that that doctrine advocated slavery.And then I ask you to look at the jihadist group known as Isis. Isis invaders executed hundreds of Yazidi men and kidnapped as many as 2,000 women and children a couple of months ago. They justified their actions by using that same exact Kuran, using the sayings of the prophet and traditional Islamic law to endorse the enslavement of 'infidel' women captured in wartime. How can, in this case ,their be a problem with 'interpretation' when the Kuran itself shows many examples of their actions and okays them?