It does not mean that Christians cannot be involved in office, nor does it mean that the government can't give money to Faith based programs. You will notice that most laws ignore the second half of the clause and do just that- prohibit the free exercise of christianity. Yes, none of thenm care enough to even think about it. Facts are Facts. This does not mean that everything that science thinks is true, is.
Scientists are human and prone to be swayed by personal convictions.
The search for truth no matter how much you hate the answers, is a good thing. But that is rarely done- on both sides of the issue Evolutionists and creationists alike. I pray when I am moved to do so. I do not currently attend Church for various personal reasons. This does not however mean I am a young earther.