Our lawmakers need to stop the excuses and false rationales. Other countries have mental illness. Other countries have video games. Other countries have racists. But only the US has frequent mass shootings. Why? Because only the US has more guns than citizens. Only the US allows civilians to own military-style weapons.
You can’t have a shooting without a gun. Hence the name — shooting. (Stop deflecting with arguments that knives or baseball bats can kill.) You can’t have a mass shooting without a gun capable of killing many people quickly. That requires a gun designed to do exactly that — an automatic military-style weapon such as an AK-47 or an AR-15. Or a lesser gun with a bump stock. Or a very well trained gunman.
The common denominator in mass shootings is not mental illness, video games, or racism. The common denominator is guns. Regulating anything else is changing the subject and dodging the issue.