There is no relationship between religion and being able to accept others. Or, even an inverse relationship. So that is no excuse.

If his mom has so many mental health issues, how come he calls therapists quacks? Is his mom untreated?

He needs help himself, because his social anxiety is worsening and may become crippling if not attended to. Social anxiety may very well explain his issues about work (that he does not work enough, that he does not want responsibility at work, etc). He needs individual therapy for social anxiety. Couples therapy will not help his social anxiety.

"he tells me that I need to ask him for help when I need" - this is not social anxiety. It is a kind of selective mental retardation that manifests itself only when it serves his needs. You need to be severely mentally retarded to say that in the context of your overall relationship.

Another thing that seems to justify my calling his issue "selective mental retardation" is his attitude towards your PPD.

So you were AT FAULT for PPD.

OK...

...but then he is AT FAULT for social anxiety.

...double standard, huh?