Dave Rubin is a popular YouTube host who was once on the left. He worked for The Young Turks TV show.

But Rubin tells John Stossel how he gradually changed his mind and became a classical liberal. For that, Rubin lost friends and gets protested at college campuses.

While many leftists are so angry at Rubin that they will no longer talk to him, conservatives are eager to talk. Rubin says that surprised him because, "I'm pro-choice. Most of them are pro-life. I'm against the death penalty, most of them are for the death penalty."

Stossel had a similar experience. "When I went from left to libertarian, the right was willing to argue," he tells Rubin.

Rubin calls the atmosphere on many campuses an "Oppression Olympics," where students and faculty compete to be the biggest victim.

As a result, ideas that offend "victims" are often off limits for discussion.

But Rubin says he will not bow to political correctness. He'll keep discussing uncomfortable ideas: "I would rather live and stand for whatever I believe in than just bow forever."