I'm sure many of you come from Christian and Jewish lineages, and are aware of the queer senses of guilt that accompany them.
As atheists (or secularists) are seldom unified as cultural groups, and scattered across populations, I find that we carry the social identities of our affiliated groups (e.g., Southerners, Americans, Christians, college kids). That is, we are members of social groups that do not share our own thought processes and beliefs (ever heard of an atheist neighborhood?). Just about every major population on the planet is saturated with stupidity, and thus I think we all share a sort of 'Guilt' where by being an atheist we judge our own groups, and thus feel guilty for be associated with them....
For example: every time I read international coverage of American populations (maybe it should be called 'American Guilt'), have a casual conversation with a fellow southerner... etc.
I mean, I'd be lying if I didn't admit watching Fox makes me want to move to northern Europe.