While I agree that gangstas bring violence to an area, I'm not sure how they "hold us back." They are a very small percentage of our community, so they have very little influence over the lives of the Black majority other than fearing the violence.
"Holding us back" means making us immobile. We cannot move politically, economically, or socially towards a progressive direction. Gangstas in black communities don't do that. Gangstas only exist in Black communities because of politico-economic policies and practices that have destroyed resources and stagnated Black distribution of wealth over the last century. Remember that Black gangs were created solely for the purpose of protecting the community from racists and murderous cops and building institutions.
Today, they have obviously regressed into a problem for the community, I agree; But to suggest that they are the ones holding us back, meaning stagnating and regressing us, is to take attention away from real social forces that can hinder the progress of an entire race. Gangs are not that.
I grew up in the hood on the Westside of Chicago; so that is deep hood. The thugs are not as a small percentage of the community as you believe. They literally shoot up neighborhoods. How are they not holding people back when they make families afraid to go outside in their own neighborhoods? How is that not a problem when their actions run off any decent businesses and families? That whole thug mentality has taken hold of school too, because those clowns have actually tried to convince kids that it is cool being stupid.
I am familiar with the history of gangs in Chicago, but when the actions of gangs have decimated the lives of Black people to the same extent as the Ku Klux Klan; then IMO they are holding Black people back. There isn't some Uncle Tom Black man walking around that is holding back Black people. There isn't some militant Black man holding back Black people. However, there are plenty of ignorant black men holding large groups of Black people back. Sorry but that is just the way that I see it.