The problem is that there is an increasing attack on the authority of the Bible, even amongst professing Christians. The main opposition to Creation Evangelists has come from Christians and pastors who hold to theistic evolution, or progressive creation as many call it. The sad thing about this is that we either accept the literal words of the Bible as authoritative in every part of it, or we treat it as just a religious book that has no authority over us at all. A gospel preacher would not be able to say to his listeners, "You must be born again" because without the backing of an authoritative Bible, they are just meaningless words. It also means that the Ten Commandments have no authority, and that "anything goes" in the way people choose to live their lives, and that they can be free to adopt any interpretation that suits them, and they can believe in a God they feel comfortable with. People will just choose their own standards of morality, fulfilling the Scripture:
"There is a way that seems right to a man, but its end is the way to death" (Proverbs 14:12).