If Barack Hussain Obama is telling the truth in his autobiography, he is a murtad fitri (an apostate Muslim). Islam has specific procedures to deal with the murtad fitri.
But, you must remember this is an American apostate muslim. Obama will be useful to them. Besides, he may indeed be a true muslim.
He doesn’t seem offended or dismayed when he is called the messiah. Most true Christians would be. Who knows what he really is...muslims lying to infidels or non-believers is not considered immoral or wrong.