Speaking as the mother of young children - the youngest being 5 and 10, I find it hard to believe that God would hold a 7 y.o. in any way accountable for this.
At seven, most children’s religious understanding consists of what their parents tell them and no more. They want to please their parents and have their love - to keep the commandment. The child could be in the middle of a nasty parental tug-of-war; the parents could be total compromisers; religious education classes at this age are not at all rigorous. A child simply doesn’t have the intellectual sophistication to understand the issue at stake.
If there’s any argument the child’s going to go through “Your father’s church is a false church.” “Your mother’s church is a hive of intolerant bigots.”
Mrs VS
Neck.
Sea.