There are many believers who think nothing more of atheists than what they present of themselves, if they think of that at all. Believe or don't believe, as you choose or see fit. For the most part, what you do shows who you are (e x ceptions being people who have been damaged by things done to them).
Some believers are condescending to atheists, though more believers are hostile to atheists (from a world pov).
More atheists are condescending to believers, though not as hostile.
I personally think there are not enough atheists yet to be openly hostile to believers. But once there are, I suspect the hostility will be seen the same from both... because is more about the person than the belief/lack of belief. (again, always e x ceptions)
Peace,
tammy