Yes, they overlook it.
They hear the bragging and it might creep them out. But, they laugh anyway. It's only "locker room talk" after all. Their friends or family of the rapist. Or, maybe the rapist is their boss, their doctor, their lawyer, the owner of their favorite club, their wingman. They know the guy. But, they don't really see what kind of creep the guy is — or, they choose not to understand what they see.
It's the father or brother or husband whom a woman tells about some coworker cupping her breast in the supply room, and he asks what she was doing there. (My own father was that guy.)
It's the guy out with his buddy who nervously chuckles when buddy slips ecstasy in a woman's drink. And, he never says a word to the woman, not even when buddy leads her away.
It's the guy who defends men when women tell of men's abuses.
It's the investigative and legal system that defends the man by challenging the woman's virtue — then rarely or ineffectively punishes the man if at all.
It's all those men who voted for an adjudicated rapist.