Why use the bible when a police baton is quicker?
All kidding aside, I don't think sexism is a party affiliation problem as much as an individual one. The polarizing point of this stems from the same problem as just about every generalization such as; Abortion = sexism, wealth = suppression of lower classes, environmentalists = tree hugging hippee potheads, etc. Most of the problem with using general strawman arguments to further an agenda is that they get diffused among supporters and turn into a mantra, this becomes a general belief, and next thing you know the opposition becomes a stereotype.