The typical mass shooter in the US is a heavily armed white man who is angry about something. The specific roots of that anger are not always the same, but in many cases the targets of that anger are Latinos, African Americans, Jews, Muslims, LGBT people or some combination of those groups. These acts of domestic terrorism are increasingly not simply meant to kill random Americans while frightening all of us, but to kill specific groups of Americans while sending a message to members of those groups that we are no longer safe in the US.