According to the article these are the President's words, right?
WHo should he rather offend - his God or some exchange students?
How does what he said offend God?
Jesus said, "I am the way, the truth and the life, no one comes unto the father, but through me."
Jesus claimed to be God. Christianity is all-exclusive and claims that all other gods are false.
If Bush gives credence to other (false) gods, he risks offending the exclusive God that he claims to worship. I'm not asking you to believe Christianity, but it would be dishonest for Bush (or you) to claim that it teaches anything different