New All Saints parent here, not affiliated to church. I don't do drop offs and pick ups so I don't have a sense of friendliness of other parents but would be delighted to participate in new parents get-togethers etc. to get to know other families.
OP, I'm sorry you're having this experience but I'd bet there are a lot of friendly moms and dads out there who want to connect but maybe drop offs aren't an ideal way...We will be volunteering at the bake sale this weekend as one PP suggested, at 11am. Stop by and say hi!