Question for Free Masons?

If religion is defined as "the service and worship of God or the supernatural", and if all Free Masons must believe in God, and if masons gather in a temple, and if in this temple there is an alter, and if in this temple scripted prayers are made, and if people within this organization are given the title "worship master", and if, in order to obtain your third degree, you are required to swear an oath on a holy book, then can someone who is a free mason explain to me how free masonry is not a religion (of course, without violating your oath to secrecy--wouldn't want to get you in trouble with God for violating your oath)?