They’re trying so hard to gin up outrage over this and they just can’t get it going. It must just drive them bonkers. Rush’s parody works because it’s true an it’s funnier than hell.
And the Left knows it. That's why they are trying so hard to hang Rush with it, even though the roots of the parody are of their own making.
Rush is doing nothing more than what he does best with this parody: illustrating the absurd by being absurd. (and I agree it's one of his funniest parodies yet)