Shocking as they are, the number of people killed in mass murders such as this pales in comparison to the number of people who die as a result of the use of automobiles. Just saying.
It's cultural. Cars and guns are both *so* American.
It is worth noting that if you look at firearm deaths over all, in 2021 they were of the same scale as traffic deaths, that is, 42,939 for traffic and 48,830 for guns. That number includes suicide. Gun suicide accounts for more death than gun homicide.