There's no drama here to begin with, I think that the mod acted correctly, and I think drag is being disingenuous.
The anti-AI messages were removed only if completely off-topic. Note how, for example, 9point6's comment is still there; it is anti-AI but it's still on-topic (see the pic).
The exception removed per rules 1 and 3 was this comment:
A mod of !fediverse_vs_disinfo@lemmy.dbzer0.com is posting AI slopaganda [insert image macro saying "ironic"]
The comment is not just attacking the fact that the pic was made by AI; it's also calling the message itself propaganda and disinfo. That clearly violates rules 1 (socialist unity) and 3 (no liberalism), since the commenter is splitting people based on some tangential matter and attacking a message socialists agree with.
The mod maintains that a leftist meme community isn’t the place for political debate.
Not every political space is a space for discussion. Specially not discussions unrelated to the matter at hand.