Thankfully, those are few and far between and, furthermore, when they make such pronouncements they are going beyond the bounds of science
Well, you and I agree that anyone who says God does not exist is going beyond the limits of science.
However, you may be underestimating the number of people who will say such things. There are still millions of people who call themselves Marxists (or "scientific socialists") who take the official line that science disproves the existence of God. In American universities, it is common to hear religious belief equated with superstition. Even here on Free Republic, we have had lively arguments about whether a religious believer can be a scientist.