It is content censorship, also known as moderation.
Your comment is overgeneralizing and dehumanizing entire groups. Jews and black people are individuals. They do not have some kind of cultural dogma or collective groupthink. So no, I don't know what you mean, and it sounds an awful lot like you're implying one or both groups are bigoted towards each other.
And even if there's historical examples you can point to, they aren't representative of current individuals.
Even looking at the context, just glibly throwing out, "Well, you know how Jews and black people are," does not look good.
No, because it's still generalizing. This is what your original comment would be if it was modified:
Well you know how the american whites feel about African Americans haha So much rich history there
While the "history there" is obvious, how "the american whites" feel about black people is vastly different from the past. It's true that some people refuse to let go of the past, but most live in the present and will have a variety of opinions ranging from indifference to deep-seated love and support.
The issue is generalizing groups of people. It's a way to dehumanize and "other," and people should recognize it as harmful*.
*Note that there are some notable exceptions, such as Nazis; since the criteria for membership is pretty heinous and membership is voluntary, dehumanizing and othering Nazis is of great benefit to society.
YDI, you have a long history of racist commenting and this isn't even the worst thing you've said. Consider yourself lucky you weren't banned much sooner for the racist garbage you've been spewing.
The mods of this space have clear biases and ban dissenting users.
They even made it against the rules to call out PTB on one of the biggest instances (.blahaj) because they don't actually care about allowing this space to be used to call out abuse.
Not really true, we just asked people to stop reporting about being banned from blajah over their no-gatekeeping policy, because otherwise we'd have 50 posts in this community about it by now. Rehashing the same topic over and over isn't good for anyone. If there is some other PTB issues on blajah then that is fair game.
All our bans are in the modlog, for all to see. And this removed comment OP mentioned wasn't removed by a mod of this community fyi, but by one of the instance admins because it comes across as antisemitic, presumably. But given the comments that were left intact, including the one calling Jordan a Zionist , what agenda or bias are you trying to suggest here?