They are more what I would term anti-theists, although they may also be atheist. These people use science in the same way as a theistic zealot would use God - to beat other people around the head. They crave certainty and superiority, which can happen in any number of ways - it also manifests among theists, satanists, political idealogues and intellectuals, astrologers, artists, even among environmentalists. It is a very general and ubiquitous psychological problem in homo sapiens.
Basically, it is an expression of insecurity of identity.
Can you give an example of such a person?
And I'm struggling to understand exactly what you object to about "beating other people around the head" with science. If a person's views are rooted in fact, then it seems that you're not arguing that these people's views are false, but that they should just deal with wrong people more tactfully. Is that what you're getting at?