I know this must be a Cliche but isnt Islam the Religion of Peace? Just a question.
I used to ask the same question but I soon concluded that the left would have no compunction to do as they insists we not do - kill or enslave them all even if it meant nukes.
The left and the Islamists have been in cahoots for a long time. As the author says, they have a lot in common. However, the most important thing they have in common is not totalitarianism, that is a fundamental part of their system, but their desire to destroy the USA. That is the goal they are working together to accomplish. It is a "the enemy of my enemy is my friend" relationship.
Under Communism, Nazism, Fascism, or any other tight control, top down system, you are either the in crowd or you are a slave. Under Islam you are either predator or prey.