You aren’t American are you? Many families here teach their children to use guns. It’s considered irresponsible to keep guns in a house with children and not teach them to use them (though you should keep the guns locked up and away from them when not in use).

Also it’s really easy to shoot a gun without training if you don’t give a fuck about not wasting ammo or who or what you hit. Especially if you’re aiming at a crowd. It’s rare for school shooters to be decent marksmen, rather they just bring a gun with decent rate of fire and a ton of ammo and shoot into a crowd

since kids aren’t usually allowed to train with guns

What?

I went to a rural school, and everyone had a “hunters education” class in like 7th grade. We never touched a gun but we could legally go hunting with a gun after.

A shit ton of kids hunt, and most ranges are fine with kids if an adult is with them too.

Like, it varies state to state, but in lots of areas it’s weird for someone to graduate highschool before shooting a gun.

But besides all that, guns aren’t difficult.

so can any person with no expirience technically just pick up a gun and start shooting people?

So yeah, pretty much.