As has already been mentioned, criticising a religion is not being racist (religion isn't a race) and with many issues around the world stemming from religious beliefs, criticism directed towards these religions and beliefs is hardly unexpected and in no way should be condemned. Labelling a belief/ideology as being a 'religion' doesn't make it any less open to criticism than any other personal opinion.
In terms of TSR, most people on the forum do just help each other and are welcoming and friendly. However, a minority of users can give a bad impression and be quite offensive, at least with the help of moderators, this minority can be somewhat subdued.