This ‘if true’ line used in all the GOP statements is going to be their out. Next week all will be forgiven and they’ll just say it was never proven
Exactly. The "if proven true" is their fig leaf. Until these allegations are proven in a court of law (and presumably that would be very difficult), they're just going to shrug and say, "so what? I've already said he should go if he's guilty, but that hasn't been proven yet." And they can say this all through Moore's tenure in the Senate, until he does or says something else.