As much as I like the American Humanist Association's new ad campaign (and I do like it), I'd make one small change. I'd replace "bias" with "bigotry." And no, I don't think I'm being too picky here.
I think that bigotry is what we are really trying to call out. I also suspect that "bias" is sufficiently vague that many theists won't get the message. They won't recognize their own bias as such, and they won't be sure what "bias against atheists" would look like.
In contrast, "bigotry" has a much stronger emotional impact. People are much more likely to recognize it, and such a message would do more to prompt some self-reflection.
I still like the ads as they are, but I think they'd be more effective with this small change. After all, we're all biased in some way or another; bigotry is another matter.
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