I am on the same side as him (or her). I’m a Christian, devotedly so. But you just can’t approach young children and not involve their parents, or ask their parents.
Just imagine this, Satanists go and invite young malleable children. Or Mormons, or atheists. Or any group that has a message that you think is in error. If they want to invite or approach my children, they can approach me and I’ll decide.
Yep. Parents have to protect, and in so doing decide. The kids will get to decide again later, in their teens, when they question everything their parents thought, anyway. At least they’ll be better equipped then, or should be.