If I were to join a religion...
...I would become a Pagan. Lovely people, with a positive, welcoming and inclusive outlook. At a Pagan wedding I hosted, they gave a tip o'the hat to a number of deities including Jesus. I asked one of them later why they included Jesus given their history with Christians, and the answer was that basically they don't hold grudges. They're willing to live peacably with so many deities that they need to rotate them in their ceremonies, and Jesus's number just came up in the rotation that day. I love the way the central tenet of Paganism--pantheism--obligates them to get along. Quite a contrast with all monotheistic religions. I judge religions by how they relate to this world, and I judge Pagans quite favorably.