it also said "faggots" more times than any other slur but i doubt people are going to regard this as a shooting fueled by homophobia, you could argue that cracker is just another word she wrote in a manic edgelord state trying to cram as many offensive things onto paper because she wants to posture as a cool nihilistic shooter, TJ Lane wrote "Killer" on his shirt in court and gave some of the most cringe testimonies ever caught on film, Dylan Klebold wrote "Wrath" on his shirt in Columbine and made all those videos with Eric Harris, Cho posed around as Max Payne prior to V-Tech, Jeff Weise made edgy murder cartoons on Newgrounds prior to Red Lake, all these losers thought they were hot shit for just being loathsome motherfuckers.
mind you i still think the attack was 100% ideologically motivated (against Christians for the most part) but you can't really extract motivation out of a manifesto that's all unhinged schizo shit at face value, you similarly wouldn't blame Pewdiepie for Christchurch.