Mr Summers:  You are living proof that we are in an era when the message is irrelevant.  All that matters is the messenger.  If I consider myself to be on the right wing, then anything said by a fellow right-winger is, by definition, correct and okay and everything said by a left-winger is, by definition, stupid, foolish and unworthy of consideration.  The same is true of left-wingers.  It does not matter the message.  It does not matter if it's the same message from both sides.  It's so much easier to claim the person is a stupid head than to actually think.  Thinking is hard.