I think the disagreement here comes from not knowing how the school is defining "violence"
Something like an FPS with blood should definitely not be allowed.
But there's tons of rated E games that have what is technically violence, like Mario punching and kicking and stomping on things, and that's a bit harder to argue against
Of course, and I fully agree.
I believe there should be moderation in what they allow or don't, which is why I don't think there should be an absolute zero tolerance to anything even related to violence/guns.
There wasn't any claim made that
everything even remotely violent would be banned, instead guns and weapons weren't allowed. Which is a minor enough restriction for a school class.