I don't ignore that at all. When people are in desperate situations they're more likely to commit petty and violent crimes. Why are more Black people in desperate situations? Because of racism. Of course from a class perspective, it's notable that our prisons are filled all but exclusively with poor people of all races. I would argue that the greatest crimes--ie genocide, mass murder, policies resulting in famine etc. are the actions of the ruling class, that is, the rich.Black men offend at a rate far higher than any other population group in the U.S. (followed closely by Latino men). It's funny how posts like yours always seem to ignore that part of the equation.
It's good that you acknowledge that situational factors play a role in determining what group is more likely to commit crimes. Of course once we start looking at the big picture, considering situational forces the next step is to recognize that the situational factors harming Black people are the result of racism which in turn is a result of capitalism. Capitalism, and American Capitalism in particular can't survive without racism, and both are still very much alive.*Having said this, I still believe that black men face incredibly disparate treatment in America than whites do, generally, in society, and are more likely to experience poverty and social dysfunction as children, which plays a role in offending.