Here's a great treatise on the mindset behind the left's unquestioning acceptance of the "change we can believe in" folks. This explains the comfort the left has with radical Islam, and you'll not like the reasons why. At least you'll understand how socialists, radical environmentalists and Islamofascists make such good bedfellows these days...
Know your enemies.
This is one of the most important articles I've seen this year - please read it all.
A big hat tip to Mike at Sipsey Street, linked here.