See, that is the entire problem. If the moderators are going to do that (or if the system is automatically going to do that) then just delete them without comment, instead of drawing attention to it. In this case, the moderator left a warning against discussing politics, even though there was nothing political in the remaining posts leading up to that point. Either leave a tiny, edited snippet of the problematic post, so we have some clue what the heck the moderators are talking about, or simply delete all of the offending posts without comment whatsoever. Either way would be better than a potentially confusing warning without context.
Yeah, I know: This is not the thread for discussing the forum rules nor for discussing what happens to posts after they get deleted. Sorry to take us down this rabbit hole, but things like this just irk me.