Gotta point out that the french protests, while they are in general for everyone that doesn't mean it's not extremely partisan and divided. It's just we all know Macron is absolute trash 🤷
I have guns. I'm not ever going to shoot one in the middle of a crowd of people. 90+% of bullets miss their target in actual combat.
If I was carrying my gun and a mass shooter went off, I also probably wouldn't engage. My little 9mm is good against a carjacker or a mugger with a knife. It's mostly for dealing with wild hogs - I shoot about 1 a week with it.
In a mass shooting, the rule is to escape. If you can't escape you hide. If you can't escape or hide, fight back. Having a gun on me doesn't change that, and I'm certainly not volunteering to get in a gunfight against a crazy person with a long gun, extra ammo, and no concern about collateral damage armed with only my little pocket pistol.