You can mock them, but it won’t demoralize them, certainly not with this specific insult. They celebrate being dickish. What Democrats don’t already know that Trump and his cronies are dicks and bullies? How does it benefit Democrats? It’s not like they haven’t tried insults before. Weird, rapist, Mango Mussolini (and all other variations riffing on Trump’s orangeness), couch fucker, etc. were all thrown around plentifully.