Before you all call this 'leftist,' you should keep in mind, or consider, that 'isolationism' is a school of thought on BOTH sides of the political landscape.
Pat Buchanan, republican to the bone (worked for Nixon), is an isolationist. I believe Goldwater was an isolationist. Some leftists are isolationists (though not this one).
So don't just go off and call it 'typical' of anything. Few leftists are actually isolationists. As are few rightists.
FYI
John