I get what you mean. My pet peeve is more with "real life" people. I don't spend that much time on Lemmy anymore because, well, in a lot of ways it's a lot like the worst parts of Reddit. And, in general, I've started to notice that "internet opinions" hardly ever represent what I see when I talk to real life people. So I tend to not care much about anything coming out of Lemmy, Reddit, Twitter, etc, as I find it's often the loud very tiny minority.
But I have the habit of reading opinion pieces on a couple of national newspapers, and I've noticed the "you're an anti-semite if you disagree with me" pattern a lot. Most opinion pieces by usually left leaning political writers have been more level headed than I actually expected them to be - in the sense that there's a couple of them who usually hold far more extreme positions on pretty much everything else and have been surprisingly "center" on this issue. Whereas on the right, a few people who I would say are usually fairly moderate and level headed have gone hard on the "the left actually hates jews, they don't care about civilians" trope. And it's very confusing to me because I have yet to find any actual left leaning person who's any relevant in my country's political scene actively sharing that discourse. So it all feels like baseless deflection. It was the kind of behavior I expected out of Reddit - it's been the case for years I feel that in most bigger subreddits any critique of Israel's government would immediately make you an honorary anti-semite. Though that seems to have changed a bit after we entered the "Bibi is trying to turn Israel into a dictatorship" arc and he's not seen as the savior of Israel anymore. But it weirds me out to see these talking points coming out of real life political commentators who I would usually expect to be at least somewhat level headed. In general, with exceptions from the usual crazies and outside places like Twitter, I have yet to find the big leftist pro-Hamas discourse everyone seems to pretend is all around.