They aren't?
As for Einstein being a father of QM- that is not being debated. His findings helped form our current understandings of it. BUT- Relativity is almost entirely attributed to him, and has only been tweaked minorly since then by others.
Have you ever heard of Galileo? He actually invented relativity. Why do you think that that Einstein didn't get the Nobel prize for Relativity?
Galileo . . . another Christian and a scientist. To quote him: “God is known by nature in his works, and by doctrine in his revealed word.”