White men aren't the only people who go on rampages directed at certain groups. I think you're certainly right that people don't recognize the problems with racism in the US, but the response to that shouldn't be more racism. Stereotypes about black people shouldn't be met with stereotyping white people, it shoulds be met with admonition against stereotypes. Race isn't essential to behavior. It's important that we understand one another's experiences, but hyper-focus on race doesn't decrease racism. The violence of some individuals doesn't belong to white men as a group any more than it belongs to black men as a group. Violence is something that individuals who commit violence are responsible for, regardless of their race or gender or any other demographic consideration. Associating the actions of individuals due solely to their race is racist.