Yeah, one thing you guys have to understand is that the GOP desperately cannot back down from Kavanaugh because it sets up a precedent they don't want: that sexual harassment and abuse allegations against men can be career-enders. Sure, they laughed it up when "liberal" Hollywood celebrities were getting pinned by MeToo, but secretly they were terrified of what this would mean for politics. Roy Moore was the sneak preview, as they realized that decades-old allegations could derail and end their careers and ruin their political majorities.
Conservatives flat-out do not believe that old accusations of assault, whether they're true or not, should be held against a powerful man. They believe that women are uppity little weasels who will lie, cheat, and slander to get what they want, and that we use false allegations as a weapon to enrich and empower ourselves and destroy men we don't like. They have made this accusation against women for decades, but only in the MeToo era are their excuses finally failing to work, and it fucking terrifies them. The idea of being held accountable for something they don't consider a crime is completely and utterly horrifying to powerful men. So they have no choice but to deny, double down, and defend Kavanaugh. They have to, for their own sakes.