Presidents should say what they mean, and mean what they say. When so many comments get walked back, changed, or ignored, nobody can be sure what he is saying, or more importantly, what he will do. 
All leaders have their bouts of avoiding the truth, but more should be expected from the leader of the most powerful country on earth.
This isn't "just guy talk" in a bar or locker room, this is real life, with real consequences.