No one is denying that these things did happen, but the problem here is that your "solution" for systemic racism, is to apply systemic racism to other races in benefit of minorities, now if you want to argue "oh but we must do so because every bad thing that happened to these minorities!" then you aren't actually fighting to end systemic racism, what you actually want is to have that power for yourselves, you want to be able to discriminate and suffer no consequences for this, in other words, this is pretty much revenge for what happened back then.
Two wrongs don't make a right, if you support committing injustice just to compensate the victims of previous injustices, you're no different than the original criminal.
You people are hypocrites
If you're using racism to achieve those outcomes, it is racism, discriminating Asians in favors of black for college admissions is racism, you can try to rationalize it however you want, but this was plain racism, the people that got discriminated by AA today don't and have never owned a black slave, the people who benefit from AA today are not and have never been slaves, i am sorry but they ancestors had it shitty, but that's not excuse to hurt people today just to pay some sort of moral debt.
No, you are not "pushing back", you are just replacing racism you don't like, with racism you do like while trying to appear to have the moral high ground, you are a hypocrite.