It is too difficult take away guns from just "bad" people; that would happen after the fact which is too late. Sometimes a few bad seeds ruin it for everyone. For example, there are always a few bad students who chew gum and them stick it under the desk, on books, etc. So the easiest way for the teacher is to ban gum for the whole class. If there is vending machine vandalism, the school removes the vending machine. If students misbehave, the punishment gets worse. Gun restrictions won't stop gangs from having guns; they always manage to find guns through their secret providers. But it will reduce a lot of other types of shootings like domestic violence situatons, suicides, accidental deaths, etc. Most women shot are murdered by men they know not by strangers.
I posted a story today, I'll reshare the link, go to 17:20 for this story.
Australia is planning to implement Shanghai style martial law in August of 2022. At 18:34 he says that Canada and Australia are dry runs for what they plan to do in the US. Everyone who has a gun realizes that what is happening in Canada and Australia could only happen there because they don't have guns.