That's kind of double speak there when in one post you say that they must all believe in God to join, but in this post you say it isn't a religious organization? If it isn't a religious organization, there would be absolutely NO mention of God. For example, I don't have to tell the YMCA that I believe in God to join.
Men who want to join Freemasonry must be of GOOD CHARATER. Part of that, is their belief in GOD. Masons don't care if the man is a Jew or a Christian, so whether he believes that Jesus is the Messiah or not, isn't the point.
The YMCA would have allowed Jack the Ripper to join....the Masons wouldn't! :-)