Why? Most scientists are political. They must chase funds and will succumb to the whims of those bureacrats that dispense the funds that feeds their families.
Any scientist that a priori rules out the possibility of God is engaging in very poor science indeed.
If great scientists like Isaac Newton and Albert Einstein believed in God then who is anybody to say that God does not have the power or will to create life, or be involved in our everyday lives.
They didn't used to be. Twenty years ago, most American scientists were Republicans. Five years ago (this is non-scientific, just judging from my colleagues and friends) it was about 50:50. Today it is considerably less than that. It's not that they're getting more liberal, it's that craziness like creationism is scaring them away.
"Albert Einstein " believing in God is a quaint myth. Yes he said a few things using the word 'God'. He said a lot of other things too that don't get near as much press.