I don't see where your question follows from my post. The President's job is to represent our national interests, not make 'friends'. I suppose my point was that other countries seem to have this concept down pat, but here it is muddy.
To answer your question, I think the president should act in the best interests of the United States of America based on his core values and beliefs. If the exigencies of state cause him to do otherwise, he will be called upon to explain that to the voters, to history, and to God.
I was specifically thinking of the President's treatment of Democrats (referred to in the original post) which tends to enfuriate all of us because he is far too kind to them.
I believe that in this man, his treatment of others is a by-product of his upbringing (class), and more importantly his faith.
The question I ask is, if his treatment of Dems is a result of his faith then does he need to set it aside to be a good leader?
btw, I don't think he trusts them any more than we do, nor does he trust world leaders. He just treats them as he believes a Christian ought to. For me, that is a critical difference.