>"What is arbitrary is that the RIGHT side was chosen. Some people might think this is supporting conservative ideology, or reflects a bias for right-handed people, and they might insist that everyone start driving on the left side . . for equality."<
Oh this is totally silly. I don't know how it was decided that we drive on the right side of the road here but I've never heard any liberal or anyone object to it. If you can't come up with better arguments than this....
>"That is about as ridiculous as saying that the Christian majority must not demonstrate their faith in public, and that atheism should be the public standard for society. The absence of religion is atheism, is it not?"<
You can demonstrate your religion all you want in churches and private businesses- built as many as your want- but you shouldn't force an atheist to give his tax money to pay for religious stuff in public buildings that he doesn't agree with.