What are the "ideals of transgenders?" The right to exist, free from persecution? If you're opposed to basic human dignity and rights which you'd be really pissed about it someone tried to take them away from you, then, yeah. That's a fairly extremist view.
Immigration... well, I can at least understand the thought process. But unless you're Native American yourself, then that's just fucking hypocritical. I wouldn't say "extreme," just more "asshole." Like, you got yours, and fuck everyone else trying to get what your immigrant great-great-grandparents did - it's a kind of dick attitude. If you are of indigenous descent, then sure: you get a free pass on that topic, from me, at least.
We should be able to discuss these topics, and I'll agree Lemmy can be pretty hostile when it shouldn't be. Lemmy's got its own Overtone Window and it can be rather fascist about enforcing it. However, if you approach a controversial topic at least attempting to come across as open to debate, and not just ranting about cross-dressing Mexican laborers taking your job - and really depending on the instance and forum you post into, you stand a fair chance of having a decent discussion.
You're not going to get much love going into a feminist community whining about affirmative action is actually just sexism in disguise, no matter what.
I'll just point out that many of is are aware of the paradox of tolerance: intolerance cannot itself be tolerated, or the bigots will eventually win. So if you're feeling as it you're getting slapped down about some topics, maybe consider it your position is one of tolerance or intolerance, and know that Lemmy's aware of the danger of allowing a Nazi to sit at the table with you.
I don't agree that we should normalize transgenders in society and should instead encourage them to seek help with their gender dysphoria. I am against immigration because it is artificially increasing the cost of living in my country and raising the unemployment rate.