To take part in worship?The parents gave approval.
There's a difference between going to a place of worship and learning what it's about...it's quite another to actually participate in said worship.
Don't be dorky. To go on the trip. That's the first question, which has been answered. The second question, which is up in the air, is did the activities of the trip exceed the parental instructions.
You are in denial, Jake, bending over backwards , trying to reason wrong into right. The behavior was inappropriate. For Any Religious Institution to assume such license over Children like that is plain wrong. The Teacher was wrong, the chaperone's were wrong. It should not have happened. For you to presume that Parental consent, extended to Prayer or Indoctrination, is wrong.