It might be hard to understand, but they are miserable and really hate them selfs. They believe there own propaganda, "you are white, you are privileged, your ancestors owned slaves, you occupy space taken from the native americans, you are a burden on the environment, etc, etc..."

Its no wonder they have so much self-hate and just want to end it all. This is a type of suicide for them; only they don't want to go alone... They want to take everyone with them!