You want to talk about crackpot theories, the normal person is going to think what your proposing is that it is not men that come up and determine all ideas, but it is the chemical reactions that do all the thinking.
Then you say we don’t know everything, but if we study it enough we will understand. Trust you. Trust you, who wants to trust you. If you don’t have the whole Truth why should we trust you, you still have to put your faith into something you fancy. Why cause one day you will be able to give us something where we don’t need to have faith but we will know?
You wonder why people like the fundamentalist want to throw off science? Atleast they can make a decision under their ideas. If everything is all material and there is no spiritual, there is no meaning, aim or goal for anything. Its much easier to gamble on something that gives life a meaning, than to choose something that says life is meaningless. If it is all meaningless, then it is meaningless if we understand science.