What the fuck are you talking about? They are called "historically black colleges and universities" because historically black folks attended the schools. Historically, black folks attended the schools because they were not welcome at white universities as a general matter. White folks went to "regular" colleges and universities. The founders of historically black colleges and universities did not "choose" segregationist racial policies, white people did.
And I don't even know what in holy hell you are talking about regarding "the method they've chosen" and how it "appears to belittle other schools that didn't have segregationist racial policies."
In short, you're an idiot.