This story drives home a point I've been making for quite some time:
The right is acting like the left did in the early 1970s. In both cases, it's the aftermath of having had a President who achieved virtually all the party's maximalist goals and, as a result, is widely perceived to have ruined the country. What do you do when it turns out that your cherished goals actually hosed the country? While some people (the moderates) beg for moderation and/or ditch the party, others (the radicals) double down and say that the Dear Leader didn't go anywhere near far enough and, further, that the moderates in their party were a big part of the problem anyway. Also, in both cases, the succeeding president (Nixon, Obama) is anathema to everything that the former ruling party, both its moderates and radicals, believe in, which only exacerbates the ire and craziness.
The result is an intra-party circular firing squad, threats and actual instances of violence, and all in all an unseemly spectacle that alienates the mainstream of the country.