The animating force behind the left -- both domestically and globally -- is anti-Americanism. It's not so much socialism that they're for, it's America that they are against.
Though Radical Islam is driven by Islamofascism, it is also seen as an anti-American actor, therefore a "comrade-in-arms".
Little do they realize that, in the event of their mutual success, they would be the first ones beheaded. Whether for homosexuality, for feminism, for secularism, for their simple dhimmitude...
“The animating force behind the left”
The animating force behind the left is Satan.