It does make a little sense, when you consider that one of the goals is to demotivate fascists from voting at all.
Straight facts don’t dissuade fascists. They have every argument and deflection in their back pocket ready to go. Trump is a rapist/racist/traitor? Fake news, fake news, fake news.
But… Trump is weird? That hits them right in the ego. They’re not a principled policy-based voting base, it’s a cult of personality. Even if they want to say he’s NOT weird, it’s not a fact, it’s an opinion. So all it takes is showing a bunch of really strange gaffes, irrelevant rants, and incoherent ramblings, and you just might get would-be Trump voters to feel too embarrassed to vote for him.
It’s a long shot, but based on what I’ve been seeing, it appears to be effective so far. We’ll have to wait and see.