Your own source shows that mass shootings weren’t as high as they are now prior to the assault weapons ban, thus demonstrating it wasn’t repeal of the law that caused the recent uptick. If it was, we’d see a similar amount of mass shootings prior to its enactment as well.
Using your timeline of mass shooting increases, an immediate reason to consider should be the assault weapon law expiring in 2004. Data would back that up. We haven’t had the same laws forever. https://ohiocapitaljournal.com/2022/06/15/did-the-assault-weapons-ban-of-1994-bring-down-mass-shootings-heres-what-the-data-tells-us/
Your own source shows that mass shootings weren’t as high as they are now prior to the assault weapons ban, thus demonstrating it wasn’t repeal of the law that caused the recent uptick. If it was, we’d see a similar amount of mass shootings prior to its enactment as well.