Up to a point, he’s right. The Tea Party are nationalists (but not socialists) who are devoted to saving their country from transnational communists and foreign debtors that have infested the bloated bureaucracy of a once-great nation. Beyond that, he’s full of crap.
Nationalism doesn’t mean the same in America as the rest of the world because of the Doctrine of Negative Rights.
To be an American Nationalist is to support the innate rights of human beings as superior to government.
No other nation is based on that concept. In fact, it flips the common meaning of “nationalism” on it’s head.