They fancied themselves devotees of the Gothic subculture, even though they thrilled to the violence denounced by much of that fantasy world. They were white supremacists, but loved music by anti-racist rock bands. The attack occurred on Hitler's birthday, which led to speculation in the media. Some people, such as Robyn Anderson, who knew the perpetrators, stated that the pair were not obsessed with Nazism nor did they worship or admire Hitler in any way. Anderson stated, in retrospect, that there were many things the pair did not tell friends. In his journal, Harris mentioned his admiration of what he imagined to be natural selection, and wrote that he would like to put everyone in a super "Doom" game and see to it that the weak die and the strong live. On the day of the massacre, Harris wore a white T-shirt with the words "Natural selection" printed in black. At the end of Harris's last journal entry, he wrote: "I hate you people for leaving me out of so many fun things. And no don't ... say, 'Well that's your fault,' because it isn't, you people had my phone number, and I asked and all, but no. No no no don't let the weird-looking Eric KID come along, ooh fucking nooo." Klebold said on the Basement Tapes, "You've been giving us shit for years. You're fucking gonna pay for all the shit! We don't give a shit. Because we're gonna die doing it." Accounts from various parents and school staffers describe bullying at the school as "rampant." Nathan Vanderau, a friend of Klebold, and Alisa Owen, Harris's eighth-grade science partner, reported that Harris and Klebold were constantly picked on. Vanderau noted that a "cup of fecal matter" was thrown at them. "People surrounded them in the commons and squirted ketchup packets all over them, laughing at them, calling them faggots," Brooks Brown says. "That happened while teachers watched. They couldn't fight back. They wore the ketchup all day and went home covered with it." In his book, "No Easy Answers: The Truth Behind Death at Columbine", Brown wrote that Harris was born with mild chest indent. This made him reluctant to take his shirt off in gym class, and other students would laugh at him. "A lot of the tension in the school came from the class above us," Chad Laughlin states.