Uh... Lawns, "electoralism", meat, anything to do with parenting using consequences of any kind (sub discussions about spanking, withholding or taking away items or privileges, messing with your kids, and "I dIdnT AsK to bE BorN!"), separating the art from the artist, cars, intelligence and the fact that some people are in fact just dumb as a shoe (and the corollary "why don't they teach me how to do my taxes in school instead of Pythagorean theorem!"), ...

Idk there are lots of them.

Edit: ... But why do you want to know? Do you have something planned? 🧐

Sexism/misogyny. Lemmings get really upset if you point it out.

AI is a good one.

Seemingly anything that suggests Americans might not all be dumb assholes.

Lots of good comments here. My favorite is parenting vs childfree groups. I've literally seen the communities back to back on my feed. It's mostly funny to me, a parent, because I agree with both communities and they aren't actually in opposition.

Second favorite are those guys who are all "THIS IS NOT A MEME GTFO" when someone posts a twit or tumbler post or what have you. Lol

Which Linux distro is the best.

/me hides in the corner now

IDK of enough people agree with me to make this divisive but Lemmy is fairly homogenous and loads of users don't have a lot of life experience.

Anything but big tech companies

Cloudflare

Mostly debates on leftism (typically anarchist or Marxist-Leninist) vs. Liberalism. This extends to debates where the conflict is sharpest, typically on views of China as an example.

YouTube Premium. You will never get me to say that it is not the best deal in streaming.

Beans

Vegan pet food

Steam is more consumer friendly than GoG because it offers Linux compatibility and lets the customer choose whether they want DRM.

All physical media also comes with a license.

Men are encouraged to be more in touch with their emotions, but aren't given a safe place to explore them. Men-only communities should be just as accepted as women-only communities.

"Yes, all black people" is just as valid an opinion as "yes, all men" for all of the same reasons.

The US is just as progressive as the rest of the world when it comes to trans athletes playing women's sports (no country allows trans athletes to compete in women's sports).

US gun control legislation has its roots in civil rights and class consciousness. Early gun control legislation was intended to directly target groups of marginalized people arming themselves against a tyrannical police force and that's still its main intent.

"Political violence" is passing laws that harm people, not punching someone because they voted for the other guy.

tankies

The definition of "sideload"

From my experience just a few: Linux, boomers or generations in general, capitalism, whether US politics are important or not, whether you should have an opinion about everything, whether everything has to be serious all the time or not, asking for sources on statements made, whether a drawing of a clothed porn star is nsfw or not. Fortunately, I just learned the other day that besides blocking communites or people you can also filter on keywords.

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If the genocide happening in Ukraine by Russia and against the Uyghurs in China by China are real genocides or if the genocide by Israel against the Palestines is the only real one.