You want him to choose his own path but are keeping him from interacting with others who share a different world view to yourself? It seems more like you've chosen the philosophical and theological positions for him and want to lock him away from other influences.

That would appear to be "religious [fundamentalist] atheism".

Hiding our kids from other ideologies to me is like hiding them from danger (using knives say) - they need exposure to it in order to learn a good approach and how to handle it.

FWIW I was an atheist cub scout (UK), atheist Scout, agnostic Venture Scout, and ultimately a Christian cub leader... but I'm almost certain the exposure to Christian ideals in Scouting had nothing to do with my conversion. The closest we got to theological influence was as teenagers badgering our leaders as to why we had to make a promise to a God we didn't believe in.

Groups vary of course, in the UK the greatest influence is probably the individual leader. Last I knew leaders had to be monotheist, I expect that's changed now.

The church parades of my youth would convince anyone that Christianity were baloney.

tl;dr don't throw the baby out with the bath water.