Gunman Dylan Butler said online he was“gearing up” and used a racial slur on social media before killing 11-year-old Ahmir Jolliff and shooting seven other people at Perry High School in Iowa last week. The 17-year-old mass shooter appeared to preview his plan on the social media platform Discord, where his username was “took2much,” according to NBC News. Discord told NBC “took2much” was likely Butler’s account on that platform. Screenshots of messages posted to Discord before Thursday’s shootings indicate Butler was nervous as he was “gearing up” in a bathroom believed to have been inside the…