We must be able to argue on the merits of the statement or format without sorting to personal feelings on the person, lest you become the one who is intolerant.

Why not have personal feelings about someone that sucks? We're not in a court of law deciding on whether someone should go to prison FFS. We're on a silly website deciding whether a dumb meme is entertaining or not. If a meme is associated with a shit person which results in bad feelings, those feelings negatively impact the entertainment value of the meme.

Hitler made paintings. Not wanting to hang a painting made by Hitler it your house doesn't mean someone thinks all paintings suck. It just means they think Hitler sucks and would prefer not to be reminded of the shit Hitler did every time they walk into the living room. You're saying that people should somehow forget that Hitler made those paintings and enjoy them for the paintings themselves and forget about the person that made them. But that's just not how brains work, dude. People do think of the person who made the art when forming opinions about something that's so very subjective.