Mac can always be counted on to dutifully parrot whatever GOP spin that TheParty feeds him. The ironic thing is how his favorite parrot line is about how Democrats can't think.
In this case, TheParty is afraid because a majority of Americans agree with that Democratic base, which makes Mac and TheParty the whacked-out fringe minority.
The two parties obviously differ wildly on issues, and on corruption. Republican politicians are almost universally corrupt scum, Democrats aren't. Pretending the two parties are alike is deliberately running interference for that Republican corruption. But hey, that's what Mac sees as his job.
Mac does not parrot GOP spin. In a way, what's happening is even worse. I doubt he still picks up anything. As far as I've seen, he's had what he thought was an original thought three or four years ago - wingers are all the same. Ever since he turned politics into some kind of Rorschach test, and he "sees" the same "thing" every time.
In order to do that, he has to dismiss even the starkest differences in attitudes, declare "wingers" folks who are not, and ignore wildly differing policy objectives on top of that. For since there is a radical right, there has to be a radical (regressive) left as well, and since alt-right has taken over the GOP, the alleged radical left "controls" the Democratic party. It has to, for otherwise that sordid shtick won't work, all the evidence to the contrary notwithstanding.
That means, the benefits of the distortions always accrue to the GOP, far gone as it is, but that is still an accident following that "original" thought, "all the same". The fault lies not with him being a right-winger; he is not. The fault is his construing reality around his both-side-ist ideology, and he concludes that his blinkers conquer him the moral high ground. In a way, what we get to observe is the effects of a hermetically sealed world-view, religiously pursued, in conjunction with a pretty uniquely victorious victim card: The more declare him bonkers, the more he believes he wins. It's kind of sad.