Recently, Buchanan advocated foreign aid to the newly elected Hamas. His credibility is gone. I'm surprised there are still people who publish him.
He's not an isolationist; he's just an anti-Semite. If he were an isolationists he would've opposed foreign aid to Hamas and not called for America to restrain Israel as regards Iraq. He believes in an interventionist foreign policy as long as the policy hurts or destroys the Jewish state.