Frankly, the parent's point is more visible as the rare, generally dissenting discussion is almost always downvoted and show grey.
In this submission at least, it seems to be primarily low-effort comments that are downvoted. By that I mean wild assumptions, no effort to provide any evidence to back them up or just some popular saying and a dash of moralization that suggests whoever isn't sharing the opinion of the commenter is a bad person, does not want to engage in an honest conversation, has a hidden agenda and wants to drive away the good people etc.
When someone is offered a conversation and results to name-calling and straw-manning, isn't a downvote what you'd expect?
Funny thing is, it looks the other way around from the other perspective.
Maybe what you're seeing is not a bias against race- and sex-based DIE initiatives, but your first taste of balance in discussions about them.
Maybe because you assume that your argument is correct, whenever you see the other side at all, you feel like there's an imbalance, when perhaps it's just that you have a warped view of the landscape of opinions on these matters.