I liked Ron Chusid’s take at the Liberal Values blog the best:

Charles Johnson’s Reasons For Leaving the Right:

Charles Johnson of Little Green Footballs has been rejecting the excesses of the right wing movement for several months. Today he issued a list with the following reasons why he has parted ways with the right: […]

The reasons are similar to those I have frequently written about here. There is some hyperbole here. For example, while I have had a few posts disagreeing with Robert Stacy McCain I have never thought of him as a fascist. McCain responds to Johnson here). Even in the case of Pat Buchanan, while he has certainly shown sympathy for the Nazis, I’m not certain that he outright supports fascism.

One irony here is that much of what he writes here could have applied to his own blog in the past, but he still deserves credit for rejecting that mind set.

To be fair, some of what he says could apply to some on the extreme left. I’ve noted some of the anti-scientific views of people such as Bill Maher on medicine and vaccines, but this is far less prevalent than the belief in creationism and denialism of climate change on the right. I’ve also criticized some on the left for conspiracy theories of their own, but again this is far less prevalent than on the right.

The significant difference between the right and the left with regards to extremism is the degree to which the extremists dominate on the right. The extremists on the right have driven out virtually everyone else. They dominate the major organs of the right from the right wing media to the Republican Party. The left has a handful who, in their own ways, are as nutty as the extremists of the right but they are marginalized rather than the dominant players.