Well, I'm not nec an atheist, I'm just able to admit that I don't know. What I do know is that "God" in the portrait we paint him in is not real.. I reject the bible and its bs, that's only logical.. but outside of a biblical context could a creative being on such a scale exist, certainly.

People who reject the bible and other religious doctrines are usually a confused people, but not nearly as confused as those who believe in the god of a certain religion, being, religions were either instigated as easy answers to questions people could not otherwise find a basis to try to answer or purposefully instigated to mislead the true science of the soul into a recycled world of entrapment.

So why atheists above other groups may be manipulated? My guess is, people who don't know what to believe or uncertain in their beliefs are more likely to be persuaded over the other religious half that are too stubborn in their ways to ever consider they've had it wrong.

It actually sounds like you're asking "why are people who aren't already manipulated so easily manipulated?" people are just easy to manipulate if you take advantage of what they may or may not know.