Type into Google "Atheist stupid". Notice how there is no "auto" fill (the drop-down box when you type in something and it tries to find the most common searches with the words you put in). Now do the opposite with "theists stupid", notice how immediately when you type "theists s-" the "theists stupid" shows up as the first option. What does that tell you?
Science can help find some "truth", but I think science is mainly more about understanding and development. And the purpose of science is not to discover "truth". Then, of course, there's "truth" that science doesn't even bother trying to discover (IE historical truth).