Just because he doesn’t want to bomb other countries. Just because you don’t want a ‘World’ government, a centralized control system that takes away the liberties of the individual, doesn’t make one “Isolationist.” He wants to be friends with other countries, trade with them, visit them, have them visit us, respect their sovereignty. That’s the opposite of “Isolationist”! That’s engaging the rest of the World in friendly, sincere way. And not wanting to be some kind of control freak of a country which in essence is no different from bigotry and Imperialism.