What's the point here? We should be content with anti-white discrimination now because anti-black racism used to be really, really bad? Is it justice to punish

What's the point here? We should be content with anti-white discrimination now because anti-black racism used to be really, really bad? Is it justice to punish innocent people with pale skin because other, mostly dead pale skinned people unjustly punished dark skinned people? Or perhaps that there is some threshold of suffering that one's most recent ancestors endured before they're permitted to complain about discrimination? I'm not following.