Re: Sometimes you've got to wonder...
Take it from me, many of them really believe it. I've run into enough of them, and engaged a few in debate. Their fanatical faith in a system that has accomplished nothing but death and destruction through its entire history has to be seen to be believed, and can only be matched by some of the extremists on the outer edges of fundamental religion.
Some, of course, do wear their leftism like a convenient suit of clothes to get along in their environment, kind of like a leftist politician goes to church for the photographers to keep the mainstream voters happy.