inkblot, i would find another church and NOT reply to the email, he did not contact you before he got this "official" email from the religious charity and sounds doubtful he ever would.

you have already worked out that they dont "approve" of homeless persons using their facilities in this church, they were rude and arrogant towards you, and showed you little regard face to face, do you really want to be involved in a church like that?

keep looking is my advice and show the priest the same regard to his email has he did to yours.