I am not an Atheist, yet based on experience I've found Atheists to have the greatest set of morals and they have nothing to gain.
Agreed, and that is prescisely why , their kindness is usually a well thought out personal decision.
Eg. Pew statistics show less divorce amoung athiests than JW's. I guess because their commitment is genuine, as in some cases JW's will marry because they have to.