But their brutal behavior was happening years before the gas chambers. So that can't be the justification for all their terrorist attacks in Palestine. I know they claim they gave advance notice on the hotel bombing, which I personally don't believe but let's play the devil's advocate and say they did and 91 people still died. They definitely did not give advance notice for all the other countless terrorist attacks and bombings in 30s. And they weren't trying to destroy documents in all those terror attacks. Their goal was to drive the Arabs out of their land.
The Palestinians and Jews were going at each other equally hard in Palestine. You trying to frame it as Jews just showing up in Europe one day and killing innocent people is incorrect and ahistorical.
In the nineteenth century, under the Ottoman Empire, Palestinian Jews lived mainly in Jerusalem, Safed and Tiberias. Haifa and Saint-Jean-d’Acre had smaller communities. In Jerusalem, as is often the case in the Arab-Muslim area, the Jewish condition was marked by a climate of humiliation and widespread fear, as witnessed in the nineteenth century by the Jewish traveler Abraham Yaari in his book Voyages en Eretz-Israel5: “The Arabs are violently hostile to the Jews, and persecute the children of Israel in the streets of the city. If a notable or even lower-class citizen lays their hands on a Jew, we have no right to reciprocate, whether Arabs or Turks, for they are of the same religion. If a Jew is hit, he must adopt a supplicant attitude and not retaliate with unkind words, lest he receive even more blows, for, in their eyes, we are people of nothing. Sephardim behave like this because they’re already used to it. But Ashkenazim are not yet used to being struck by Arabs, and they respond with insults if they can speak their language. If not, they gesticulate in anger, and then they are beaten even more. […] It’s the same for the uncircumcised (i.e. Christians) who are in exile [sic] like the Jews, except that the uncircumcised have a lot of money, because they receive it from the kingdoms of Europe, and with this money they can bribe the Turks. The Jews don’t have enough money to do the same, therefore they’re even more “exiled””.
In 1831, “Southern Syria” (the Arabic name for the province known to Westerners as the “Holy Land” or Palestine), of which Safed was a part, was annexed by Mehemet-Ali, Viceroy of Egypt. Safed’s Jewish community, one of the largest in the country, had long been predominantly Jewish, as evidenced around 1625 by the Italian orientalist Franciscus Quaresmius, who wrote of Safed that it was “inhabited mainly by Hebrews, where they have their synagogues and schools”
You can find multiple pogroms against Palestinian Jews in this source.
Accounts of the month-long event tell of large-scale looting,
[6] as well as killing and raping of Jews and the destruction of homes and
synagogues by Druze and Muslims.
[7] Many
Torah scrolls were desecrated
[3] and many Jews were left severely wounded.
[8][9] The event has been described as a
pogrom or "pogrom-like" by some authors.
[10][11]Hundreds fled the town, seeking refuge in the open countryside or neighbouring villages. Lebanese Druze troops quelled the rioting under the orders of Ibrahim Pasha following the intervention of foreign consuls. The instigators were arrested and later executed in
Acre
en.m.wikipedia.org
So you can say the Jewish extremist ethic is combination of past treatment in the Middle East, the holocaust, and finally having superior numbers.