The original post by @spujb@lemmy.cafe was a woman wearing a shirt that says "Italians do it better". Someone asked what they do, and drag explained the joke as best as drag understood the intention, though drag disagrees that Luigi killed that CEO. It's not a call for violence, it's an explanation of a joke. Other people interpreted the joke the same way.
Less than an hour later, Flying Squid banned drag for that explanation, and for saying Luigi is not guilty. According to Flying Squid, referencing the CEO shooter case and saying Luigi didn't do it is a call for violence. Expressing support for Luigi Mangione is a bannable offense on LemmyShitpost.
EDIT: The Picard Maneuver responded to drag's appeal and reversed the ban. Drag will be deleting this post as it is no longer relevant to the current state of affairs on Lemmy Shitpost.
You were banned for saying "Kill billionaires".
Not for saying "Luigi Mangione isn't guilty tho".
Even if you didn't mean it as an invitation or incitement to homicide and merely as an answer, completion, or riff to the previous statement, on its own it can be interpreted that way.
I'm rooting for Luigi too, I don't feel sorry about the death of the UnitedHealthcare CEO, and I do think billionaires shouldn't get comfortable with profiting from our suffering. But the mods reserve the right to remove stuff they feel could get them in trouble, chances are someone did interpret it this way and made a report (wasn't me I swear). There may be certain contexts, communities, instances, where this is allowed but you will have to determine that or ask.
One would have to be a moron to take that as an imperative rather than as an answer to the question. That's bad moderation.