I really, really hate this argument. Yes, the left has whack jobs. However those handful of crazy lefties on twitter pale in comparison to for instance: the entire state of mississippi (hyperbole).
Yes there are nut jobs on both ends, and an intelligence test would be great because it would weed them all out. It would, without a doubt, have a larger effect on the right wing conspiracy theory chugging morons.
Use this board for an proof. Who on here thinks men can get pregnant? No one. Who on here thinks covid is a conspiracy theory and masks shouldn't be worn? Damn near half of you all.
Also what does more damage? Crazy lefties and 53 genders? Or climate deniers? One is good for a laugh, the other literally threatens our very survival as a species.