One of the ‘Occupy’ crowd stated that we have to decide whether we want to live ‘isolated’ or as a collective. This is the fundamental divide between the left and the rest of us. We don’t want to live as a ‘collective’. We don’t want to be the ‘Borg’. We value individuality and self determinism. Isolationism and individuality are not even remotely the same things.
Further, their view of a ‘collective’ is not voluntary. It’s very much like the Borg - “You will be assimilated.” That is not in any way consistent with individual freedom, which is the bedrock of America.