Because we always vote for the lesser of two evils, we now have a system where candidates can be as evil as they want as long as the other candidate is more evil. There is no incentive to be anything except slightly less ghoulish than the other person. And even then, they can usually get away with being more ghoulish than the other person if it fits well enough into the current bigoted zeitgeist.

Pro tip: you do not need to become a theocratic Nazi just to get with a woman you’re attracted to