Technically, the “school” part of this maybe tenuous at best but then again who is to say the Indians (I’m sorry, Native Americans) had buildings for school. School could have been 20 children in a circle in a field learning things like language, culture, useful lifeskills like hunting and gathering, etc.
The point remains that under disarmament you subject yourself to the will of those with guns. Now it certainly was “safe” to have Indians with no guns. It was safe for those seeking to displace the Indians from their land. Of course to the gun bigots the eradication of personal firearms is their priority which is like preventing drunk driving by targeting sober drivers. Again, the mindset of the mentally deranged anti-gun people is one of a focus that attacks self-reliance.