The "horrible influences" you mention are very real. Just recently I finally got round to blocking lemmy.ml. I always kept them around because I do value breaking into other echo chambers a bit to see things from their point of view.
They recently had a video posted, hosted on X, with claims that Israel conspired with Morocco to release migrants into Ceuta. The X post itself was filled with antisemitism. And I meant full-blown antisemitism, like Jewish caricatures, Nazi-rhetoric, not the "antizionism = antisemitism" kind.
I commented that I felt a bit uneasy taking a completely context-less video, blaming what's happening on a "Jewish conspiracy" (that's how it was being phrased) and simultaneously fully going along with far-right talking points (that Europe is being "invaded" (despite 95%+ migrants already having returned because Ceuta is not in Shengen) and that "Jewish elites" are conspiring to replace Christians with Muslims (great replacement theory but even stupider I guess)). Not to mention the total lack of class solidarity with the migrants.
Comment was upvotes +16 last I checked, but then got removed and I got banned for "zionism" (despite very clearly expressing my disdain for Israel and its genocide in that same comment). Antizionism must be kept separate from antisemitic influences, or Israel will use it to dismiss critics and justify their genocide. That .ml has apparently failed to do this is not something I wish to tolerate.