I find your emphasis in this discussion to be peculiar. You seem to be suggesting that religious beliefs of scientists are a problem because they can lead to the corruption or perversion of science for the purposes of maintaining those religious beliefs. But is it only religious beliefs (as traditionally understood, i.e., beliefs based on the Bible or Quran etc.) that do this? Is it even primarily religious beliefs that do this? What about Lysenkoism in the Soviet Union, which hampered the development of biology? That came from Marxist ideology, which was certainly not Bible-based. And take the case of Doreen Kimura, the psychologist who has published on the subject of differences between human males and females in brain development in pre-adult life. She has tried to present hard empirical science showing that in fact there are real developmental differences that cause male and female brains to be “wired” differently as development proceeds. And guess who has criticized her work on ideological grounds? Not traditional Christians or Muslims or Hindus etc., but feminist theorists and so on, who fear that if even the slightest difference is admitted between males and females on the physiological level, someone will attempt to turn that difference into social discrimination against females, or use that difference to oppose affirmative action programs designed to produce a 50/50 split between male and female engineering graduates, or whatever. It’s a feminist, secular, and quite political orientation in this case that wants to block or ridicule objective scientific research – not Bible-Belt religious thinking.
Further, in response to a concern you or someone else here raised about possible connections between racism and religious beliefs, I would point out that on one very reasonable interpretation of Genesis 1-11, racism has no foundation, because all “races” are ultimately descended from Adam and Eve, and so human beings of all types are not different in essence, but only in trivial modifications. Thus, even a fundamentalist could be rabidly anti-racist and egalitarian. (Indeed, my experience of Bible-based Christian groups on university campuses is that they tend to be multi-ethnic, with students whose ethnic background is African, Latin American, Asian, etc. all praying and singing and studying the Bible together with students of Caucasian roots.)
In short, I don’t see that traditional religious belief, any more or less than any philosophical or ideological commitment, has the potential to damage or corrupt good science. If your point is that science should be conducted in a religion-free, ideology-free, philosophy-free manner, it may make some sense, but in that case, why not simply argue that all scientific questions should be settled on the basis of evidence and theoretical coherence, regardless of the personal motivations of those doing the science? If someone provided genetic evidence that all human beings ultimately have a common origin, why get sidetracked into the question whether the person’s fundamentalist or socialist beliefs may be influencing the person’s science? Why not simple evaluate and assess the genetic arguments, and keep the inquiry into scientists’ personal beliefs out of it? Why single out religious belief, especially as particularly problematic, if the important thing is simply to objectively assess the soundness of the scientific conclusions?