From comments I've read from blacks on a number of websites apparently many of them sincerely believe (despite the evidence) that whites commit as many crimes as blacks. I'm sure some black people know what's up, but obviously many are extremely deluded.
It is racial profiling, its just not racist. There is nothing racist about recognizing the fact that young black men have a much greater probability of being criminals than any other segment of the population. Now detaining someone without cause is unconstitutional (not that anyone cares anymore) but searches following stops for j-walking and other petty offenses is effective and constitutional.