Do atheists need some faith?

[Erinome]

With all of the desperate religious nuts out there, if there was evidence, I assure you it wouldn't be overlooked.

How can you be sure that you have not overlooked or misunderstood something that may be evidence for theism if not on faith?

If you have some evidence for theism, I'd be glad to give it a look. I don't actively look for evidence of theism. Do you actively look for evidence that other theistic philosophies and doctrines are true? Are you actively looking to prove Scientology or Zoroastrianism? How could you be sure you haven't overlooked or misunderstood anything, if not on faith?