Not to defend “them”, but I really do believe that very little of this has anything to do with the fact that she’s a woman. It’s a red versus blue thing, democracy versus fascism. At this point, it doesn’t really matter who runs for president, wrt gender or even race. Trump has attacked her race far more than mentioning anything about her gender. Nonetheless, Trump just sees the dems as “the enemy“, and has convinced all of his cultists to view things in the same terms.
Any other Republican of this current generation would probably attack her on her gender as much as her race, but for some reason, Trump only attacks things he doesn’t understand such as biraciality (biracialness? Biracitude?).