It's been like that for a long time in the popular subs. You can be extremely respectful and everything. Disagree with the hivemind, you get shadowbanned or banned.

Even on Lemmy there's a hard left slant. And not the fun progressives who just want to be free to believe what they believe alongside everyone else. The hardliners who don't even look at you as a human being unless you believe what they believe. They're the left wing equivalent of the fundamentalist religious folks on the right, but dare I say even more zealous in their belief that they follow the one true and perfect moral doctrine.

I grew up on the right. That pattern of intolerance is exactly why I course corrected into a left winger in my young adulthood. The left has become the same thing. They justify it as "intolerance to intolerance", but spend some time talking to them and you quickly realize it's the same old tribalism. They are intolerant of even the most basic and respectful disagreements. They can't even entertain the idea that they might be slightly wrong. That's how you know it's ideology, not an ongoing rational discourse.