Catcher in the Rye

So for this blog, I decided to do the scene where Holden meets the nuns. This is an important scene in the book for many reasons. First, he actually ends up liking the nuns. Up to this point in the book, he had yet to actually like someone or something. Finally, he meets people that he can't criticize just because they annoy him or are phonies. The nuns were genuine people and he almost admired that.
This part goes against almost every motif and textual echo we've developed throughout the book. The only echo it follows is that he invited them to have a drink, which seems to be what he asks every person he sees. It's almost creepy how many people he talks to and asks to have drinks with him. Holden talks about phonies, again, but this time it was in a different manner. He said that the nuns weren't phony and he even gave them money for charity.
I wish that this had developed Holden's character, but he just reverts back to old thoughts instead of judging people in a nice way. Phonies phonies phonies... blah blah blah. He needs to understand that the world is not full of phonies and fakes. Also that he isn't going to get along with every person he meets. Holden should give people a chance, maybe then he would have friends or even a girlfriend.
At the end of the scene, Holden accidentally blows smoke in the face of the two nuns, and felt incredibly bad about it. This may symbolize his life. Anything he likes, turns out to be something fake, or phony. This could be why he judges everyone and doesn't let them into his inner circle. He could just be afraid of losing someone he cares for, like Allie. He cared for him more than almost anyone in the world, and then he passed away. Holden could definitely have some psychological issues at hand.
My only question is why did Holden open himself up to the nuns and not anyone else he met?