Maybe it's because of our culture. Different countries, different cultures.Other countries also have these common denominators and do not have these mass killings. In our country, they have access to guns and guns that can shoot many people in a short period of time.
I don't know what the gun laws are in Russia, Brazil, Namibia, Madagascar, Switzerland, Turkey, etc. I'm not saying they don't have stricter gun laws. I don't know.