Hexbear, lemmygrad.ml and lemmy.ml are the "Tankie Triad".

Hexbear is the worst most extreme of them and lemmy.ml is the least which is why they've managed to avoid getting defederated from world (either that or because they're like the third largest instance behind only .world and SJW)

Hexbear is pretty widely defederated

I would block hexbear. I've done it server-wide. They are mostly very loud trolls pretending to be communists. Some could be actual communists, but I don't buy anyone actually wanting to be in such a toxic environment and believe what they claim to believe.

TLDR: they are right-wingers pretending to be left wing

Hexbear, together with Lemmygrad and Lemmy.ml are left wing, communist instances here on Lemmy.

A lot of (new) users of Lemmy have very strong - as in negative - feelings about them because of their ideas. Which to me makes sense because a lot of these users tend to be more centrist in their views and have never read Marxist literature before.

I will be honest with you and tell you my experience: they can be dickish and straight up trollish in their behavior, but not anymore than your average online trolls. The actual main reason people dislike them, is because they stick together and sometimes "brigade" post which nominates them and talk shit about them.

I personally was on the receiving end of their trolling when I first joined Lemmy too. But among the trolls, there were also very nice users who gave me friendly replies. And I had great conversations with them.

Eventually I even decided to open an alt account in one of those instances to learn more about their views and engage with them on their political knowledge. I really enjoy learning from them and having open conversations about politics with them. Even when sometimes I see their more extreme opinions, I still try to always be open minded at first. More often than not, I will learn that something I used to think on a subject, was the result of historical misconceptions or straight up propaganda. That is not to say that they can't be wrong of course. But it pays off to be receptive about new points of view.

There are some elements that can be considered extreme, especially to someone from the general public who has never engaged in political conversations with someone who is very much to the left. It takes a little adjustment if you want to try and engage because so much of the media and literature we consume reinforce our views on the system while they specifically try to be critical of it.

Bur FOR SURE you will never see that instance be racist or bigoted. I have lost counts how many times I've seen that in other instances, but with them, you know exactly where they stand on that. As in, they do NOT tolerate that.

Tldr: Hexbear (with Lemmygrad and Lemmy.ml) are openly communist instances on Lemmy. They are very vocals because they have a large userbase. They can be trolls that stick together sometimes. If you are politically interested/involved, I instead recommend joining one of their instances to see for yourself.

Edit: you can also tell how much people here have a negative feeling about those instances by the reactions in this post. Everything remotely critical is upvoted, while anything that even hints a positive opinion of them, will be downvoted. And then more and more users will start downvoting without even reading the comments. And they will start attacking users because they disagree and feel the need to attack them because "that instance bad"...in a way not too dissimilar from the brigading I mentioned before for some of the users from those instances. Showing you a real life example of how there are extreme users in every online community

Note: being on Lemmy for about a year, I didn't live through the early days of this place. Here's what I can recollect, as neutrally given as possible.

TL;DR The recent conflicts between two politically different groups on Lemmy have radicalized many people, and many Hexbear residents in particular. Unless you are to discuss the far-left ideas and are very radical about disadvantaged groups, you are safe to block it.

Hexbear is a far-left (as in actually communist) anti-discrimination community, initially more of a safe haven to promote equality and foster a healthy and welcoming place for leftists to come together.

With core developers of Lemmy also being far-left, Hexbear naturally fitted the landscape along with the official Lemmy.ml, heavy far-left Lemmygrad.ml and others.

As time went on, however, all sorts of left-leaning and apolitical folks, not just far-left, came to the platform, filling other instances like Lemmy.world (now the most populated of them all), sh.itjust.works and many others.

As a result, Lemmy has two groups of people with radically different political views: one is a group of more or less organized far-left, and the other is everyone else, most commonly liberals. This distinction has caused a lot of conflicts and heated discussions based on political adherence.

Most notable case is latest US elections. The far left side generally called not to vote Democrat as Biden has failed to deliver on many of his promises and empowered Israel to commit war crimes in Palestine, while the liberal audience called to vote Democrat to not let Republicans take the lead, which may arguably lead to an even worse outcome than unaccountable Dems can make.

This divide has raised a lot of mutual hostility, brigading, and uncivil behavior, which has radicalized many on both sides of the conflict, the consequences of which you have got to experience.

What to do with that is up to you to decide. Hexbear is very politically uniform and very political overall, so if you're not here to discuss communism, you won't lose much and will gain additional peace of mind.

ITT: everyone says they're bad without giving any examples, telling you what to think instead of letting you form your own conclusions.