PAUL SPERRY: Don’t be fooled by Bernie Sanders — he’s a diehard communist. “If Sanders were vying for a Cabinet post, he’d never pass an FBI background check. There’d be too many subversive red flags popping up in his file. He was a Communist collaborator during the height of the Cold War. . . . While it may be hard to hate the old codger, it’s easy — and virtuous — to hate his un-American ideas. They should be swept into the dustbin with the rest of communist history.”