Take a look at this thread. I commented trying to encourage a healthy direction, but giving this guy proper actual scientific/medical info that would help him live a healthy life would almost certainly get you removed/banned from beehaw, and the rest of the comments are encouraging something that will harm this person long term.
This happens a lot in more "progressive" lgbtqia-style spaces, because a lot of their ideology is fundamentally something that can, will, and does harm a lot of people. Look up "detransitioners" as a good example of things going wrong.
To me, and other people who are not aligned with their worldview, it's obvious that there is harm in the ideology being pushed, and by censoring those who have a difference of view, or who try to stick to proper medical science, you end up funnelling people into paths that end up harming them.
Of course, others will disagree and think there's no harm in this (that's why they're commenting as they do). But I'm someone who's seen it first hand many times and so I simply can't get on board with that way of doing things.
It's not overtly "hateful", rather the opposite: toxic positivity. But still harmful. But my point here isn't "you should actually defederate from beehaw". My point is that what people think is "harmful" differs depending on your views and beliefs.
If I tell this guy, hey you have a medical condition called transvestism, have gyneandromorphophilia, and are at risk of further developing dual role transvestism and gender identity disorder, is that "hateful"? Beehaw probably thinks it is. But IMO that is simply helping and informing.