He can't. It's obey God or obey the world. God says share the good news while the world says shut up and keep it to yourself. We can only follow one and having read the last page of the Book that says God wins, we choose God. The good news also comes with a warning. Though we understand the world doesn't believe it, we share it anyway in hope of saving as many as possible from the coming judgement. It doesn't hurt that if everyone followed Jesus' teachings the world would be a far more peaceful place.
