From my experiences with church youth groups I've come to realise that they are generally filled with very judgemental people.

A lot of them have grown up in the church their whole lives and have this idea of what makes the right Christian/Catholic (whatever faith we're going with) and anyone who doesn't fit that mould is somehow doing something wrong or can even be a scary threatening thing to them.

I know I had some gaps back when I was going and I definitely felt like people decided I'd lost my faith and turned from God and didn't want to be too close incase I somehow turned them bad as well. In time they generally got used to me being there again and welcomed me back and all that stuff.

Religion can be quite close minded, search out the good ones in the group and stick with them and try hard to ignore the rest. There will always be some f***heads in every group of people.