Let's not focus too much on the past problems that a group of people had, but let's make sure that the situation is improved for that group right now.
Focusing too much on past and try to tip the scale _because_ the past was so bad may lead to bad outcomes today. It may be perceived as a search for grievances and retribution and not the equalization of outcomes that one claims it should seek.
They just don't like it when it's other people
But they think they can do it because they can spin it as "you did it first".
This just makes the point that there is nothing to gain by framing the issue as a grievance.
There are real prejudices and real systemic disadvantages to fix and while it's important to understand the history of them, I believe we put too much focus on that and less on what we can do to put that past behind us instead of dwelling in it. I don't think this approach of grievances has done anybody any favour in practice.
They are happy to do whatever they want, and they don't worry about needing false-equivalence precedent to do it.