"Are Voltaire, Burke, Mill, Locke and Jefferson now on a banned list of authors?"

Good question. Years ago, while at university, I read some of Voltaire's (translated) writing that included his scathing views on the major monotheistic religions, particularly Christianity and Islam. Could the tender politically correct eyes and ears of today survive exposure to such ideas? Voltaire was a rationalist. Nowadays, it appears that's gone out of fashion.