Of cause you have good points.
The terrorist would find ways to realize his wicked goals even without professional guns. But why give him this easy way? I think with mentally ill people, that are dangerous the gouvernment has a duty to take the weapons away. Even a wicked gouvernment.
I don't call for a medical check up for all gun owners, but if someone is found to be a psychologically ill person, and shows this by his actions or/and words, gouvernment has to act.
Mothers want always to protect their children. But if the child is planning to murder innocent people, she is obligated to tell. She has not. Now she is dead too.
It's not even the easiest way. I could G-d forbid help him kill ten times that by mixing chemicals under his sink. I was all about the anarchist cookbook back in the day. A dozen chemical grenades with metal shards around, people would wish it was a gun. You can't red flag his cleaning products away. Yet.
Sorry, grammar Nazi acting up, you wrote "government" the French way lol.
Again the government is positively the worst group to do this, not that he can't just throw pennies off a building and kill just as many. I agree that caregivers for crazy people should keep them from owning weapons. They can't do everything or know everything and neither the government, so the solution is always more guns in good hands.
I feel off blaming his dead mother, I don't know what her situation was.
One thing is very interesting about this whole thing, once as you get past all the waa waa. This is the first case I have ever heard of where a white person kills a Middle Eastern person and they call him crazy. In every case, he always knew what he was doing and mostly was a "Catholic/Protestant extremist". I guess they had a really hard time pulling the narrative after he killed his mother. They still found that the solution is to convince people to love Islam more, as if that would have changed a thing, but for once they don't have the fake excuse to back it, so it's a solution based on nothing at all.