A scientist does not believe that because something is there today, it will be correct tomorrow, he knows that it is a strong possibility..
When Edward Witten came up with M-theory, he didnt go out and declare it as absolute truth(like religions do), its merely seen as a theory thats worth looking into and may be be proven to be either true or false in the end.
no matter how you try to twist and turn it, science and religion are unrelated.