That is not a 100% statement there. They are not of one accord, and their morality is subjective to what ever they wish to believe in.
RR, you are correct here.
Atheist is a much more narrow term than "christian" or "jew".
Atheists simply lack belief in god. They might have a strict moral code or no moral code at all.
Atheism actually has very little if anything to do with morality (other than an atheist would not believe something is right or wrong simply because god x or gods y and z said so).
Heck, there's no reason an atheist can't adopt christian or jewish moral teachings if he/she thinks they are valuable