I referred to Google Bard in a comment as a “confident idiot” and the comment was deleted. Did I violate the “Be nice” policy, or was the comment deleted for another reason?
I primarily deleted this as it was an answer to a closed question. Comments should be used to suggest changes to a post, not to answer them.
The rudeness did affect my decision somewhat. I was not actually aware that Google Bard was a chatbot, and assumed it was the username or pseudonym of some real person that developed this theory. This doesn't really change that the comment serves no useful purpose.
I didn't delete your comment, and I haven't discussed it with the moderator who did.
If you believe that a chatbot has passed Stack Exchange's captchas and is posting on its own, that is a much more interesting problem than whether we should be polite to them. But if a person is copying and pasting some chatbot's output, we owe it to ourselves to be kind to that person.
That said, chatbot-generated "theories" are a waste of everyone's time. Don't give them oxygen by coming up with clever zingers about them. Flag as rude/abusive and move on.