The history of our black citizens is not one of immigration, a very different circumstance.  I know white people think the past should be forgotten, but it can't and won't for blacks.  Many have moved on, but the history won't be erased.   
It's re-ignited when a white policeman shoots  a running man in the back

It is ridiculously self  centered for a white man to tell  a black person how they 'should' feel.

And not all policies failed, in particular affirmative action in education helped thousands of black students through opportunity- they still had to do the work to graduate.  It a lie to say all programs have failed to help. (Not accusing you).        

Too much exaggeration is being tolerated by good people because of the election 'fight'.   Elections lead to some very strange bedfellows!!