Yes, it certainly runs against most of the therapy training in the UK, that is, advising a particular religious orientation. To tell someone how to be a good Muslim or good Christian, strikes me as not therapeutic. I trained in client-centred therapy, which means that the client is expected to discover their own needs and desires, and not have someone else's thrust on them. Ironically, that is something that many clients are suffering from - having been told what to think and do. You can't redouble on that.
But this applies to many things - if a client is having an affair, most therapists are not going to express disapproval - how the hell is that therapeutic? This is why gay conversion has been banned, because the therapists were often openly homophobic.
Actually, that brings up an interesting point - if you are telling people how to be a good Christian or Muslim, would that involve telling them that you can't be gay, or divorced, or adulterous, or trans? Again, that is about as therapeutic as a sermon from the pulpit.