Baha'u'llah has said to associate with like minded souls, as association with the darkness feeds the darkness. Slowly but surely the darkness can extinguish the light.
Actually, associating with atheists is the very least of my problems right now, but it might be adding to my problems. Just when I need God's help most, I feel myself agreeing with them about how bad God is, how God is not good for anything. Listening to this day in and day out, it takes a toll on my soul.
I do not know if God forgives me for the things I say to and about Him, but He would know what I am thinking anyway.