@dope Once a meme hits mainstream consciousness it is tough to get it to go away. Columbine out school shootings in the mind of every child of that generation, and since then toxic online forums filled with trolls have kept the idea alive be it "an hero" "unalive yourself" and just generally the nihilistic attitude of if you feel bade enough about yourself to consider killing yourself, you might as well take out some others you hate with you. This is mental illness at its core, but with the enablement of technology and toxic online "community" culture.

Then there are spin off effects of this mentality combined with the impression of the efficacy of terrorism from a psychological imprint perspective, and some narcissists will mass kill for "the cause". Again mental illness at its core, with a different "community" dynamic.

In both of these cases it is the meme, in the original sociology sense of the word, that has caused the rise of the behavior. The cultural condition of alienation and anonymous communication on the rise, combined with overall eroded access to in-person and in-patient mental health services due to the privatized health system, keeps the meme breeding in the alienated cultural class.