Some people think that a scientist necessarily should be atheist, should fight all religions and should have a problem with (religious) morals, otherwise he is not a scientist. That idea implies that religion is irrational and goes against the right way of thinking. And many young students tend to follow this ideal, if they have no strong religious education.
This idea is of course incorrect and stupid. Because it reduces the existence to what humans know and are able to discover with their mind : it means anything that we can't reach with our mind, is therefore impossible and irrational.
Atheists think the concept of God and the creation, presented in religion is absurd: A God Who existed always without a predecessor. Yet, they can't expose a right argument why they are correct and religion is incorrect. But in reality they are more irrational, by thinking that this universe existed without a creator : the eternal universe, infinite succession of universes, big-bang theory, before big-bang, etc. Nothing rational here. Let's take the big bang theory for example, considered as the best describing model of the origin of universe (which is always spreading) it's complete non-sense, if we take it from a mathematical point of view : a "singularity" of zero volume that contained infinite density and infinitely large energy.
You see science is not better than religion : the first is made by humans based on their knowledge and what they observe, relatively true, as long as it does not reach areas that are beyond mind and human knowledge. The last is from God, gives us explanations for what we can't reach with our earthly knowledge, true as long as we are believers.
Science and religion should never be considered paradoxical, but complementary : Knowledge = science + religion/revelation.
Now who said all scientists are non-religious ? look at the first muslim scientists who put the first bricks of modern science and mathematics. Look at the number of muslim scientists in egypt, pakistan, india, USA, europe.
A complete human is someone who seeks knowledge about this life and the afterlife, from science and from religion.