Magazine size laws aren't really effective at doing anything. Up in Canada you can't have a rifle magazine with more than 5 rounds. However, almost all of the magazines are full size magazines that have been modified to hold fewer rounds. All of the responsible owners leave them at 5, but with a minute or two of work you could turn most of them into full size again. We don't have mass shootings every day.
Gun violence in America is a culture issue. You're broken.
Ah nice, the "everyone who isn't a conservative is on the left" tactic. It lets you compress 80% of all ideologies into "the left," which means you can accuse everyone in "the left" of the stupid shit tankies and liberals believe at the same time!