You need to read the article for yourself- PARTICULARLY if you are concerned for the Health of the Republican party.
The key point that jumps out is that the GOP is taking a wildly different path from the conservative parties in Europe. So much so that many Tories were actually pulling for Obama in the last election. The great quote:
It’s as if your favorite cousin had a nervous breakdown, found religion, and became an evangelist for an apocalyptic cult prophesying the imminent end of the world as we know and love it.
(By the way, if it surprises you that such a rabid, albeit centrist, Democrat such as myself could express concern for the health of the Republican Party, it shouldn't. I believe that a strong, rational opposition is VITAL to the functioning of our Democracy. But while you can work with people with whom you disagree...you can't work with nuts.)