AMERICA'S FOUNDERS WERE MOSTLY NOT CHRISTIANS AND AMERICA IS NOT "FOUNDED ON CHRISTIAN VALUES"
OK I just had to get that out there because it should be common knowledge that it isn't true but people still seem to say it quite a bit
@ Wimdit: The first amendment does a lot...it guarantees freedom of speech, the press, and assembly, and also says the simple line that government cannot establish any law respecting religion, or words very similar to that. Seems vague, but the upshot is that the government can't make laws which discriminate against or favor any religious group, at least not as such. That includes using public money to fund any religious activities, stopping people from practicing any aspect of their religion (unless that aspect breaks other laws, of course) and having religious rituals be part of public procedure (of course, people still swear on religious books, which really has no place in America).
It does NOT say that nobody can have religious values as the basis for their motivations in legislation; it just sets limits on how religion can influence law. If someone believes it is moral to ban abortion because they are a Christian, they can go ahead and challenge abortion on moral grounds, but any arguments based on Christianity won't be given any credence in court so they have to argue from something else.
it even applies to that one famous case where the Ten Commandments had to be removed fro ma courtroom because they are a religious symbol and had no place in a publicly funded institution of law. This is where religious fanatics start to confuse the ACLU with some group trying to destroy Christianity - the fundies can't distinguish between removing religious symbols from publicly run establishments, where they have no place, and removing religious symbols from any publicly accessible area, which obviously would be illegal.