Didn't read all response but I would call and talk to someone at the church. Her job as a nursery worker is to love on kids and make them feel safe IMO, not to tell parent what to do with their kids. I have worked in our church nursery and while I do encourage parent to leave their kids I never punish the kids or assume it is a fit if they want mom. I hold them and rock them and sing to them or try to show them a mew toy. They usually calm down within a few minutes after receiving a little love. Sorry mommy, that is tough.
I would like to blame my phone for all the typos but in reality the poor thing is just trying to keep up with my crazy thumb typing while holding a baby.