I'm a Christian myself. As to why someone would want to be in a Christian guild , I would break it down like this .
As A Christian , we are , by default, representatives of God. We are told that our words and actions should be in accordance with what we have been taught . We should treat everyone with respect and dignity , even if we disagree with their beliefs or lifestyle . While doing this we must also balance ourselves so that we do not become caught up with others sins. Some people can't balance that. That is why we are also told , as Christians , that COMMUNITY is vital for our well being . We are told that we need to have a community of other Christians that will help us when we are failing at one thing or another ,and will hold us accountable if we behave in an Unchristian manner.
I think the OP just wants a group that will help him maintain his balance.