Because if you let them do their thing, they group together, drag more people down to their level and then get one of them elected as president. That's not in my interest.

The idea of hating all women this way is nonsensical for normal people (despite the fact limiting their rights used to be a common tradition, I believe most of the people didn't really hate them) and can only exist in some mentally traumatized people. Seeing someone exercising obvious nonsense rarely triggers you to start doing the same on systematic basis. Electing a president requires a majority vote. Even though majority's intelligence is mediocre by definition, it hardly is SO dumb and sick. Even a rude person with sexist jokes, even a women rights limiting proponent rarely is a real serious passionate misogynist, such will mostly see "cVnt_h_aters" ridiculous too.