That's what the journalist is reading from in the meme. You can find the interview online and you can find people discussing the contents of the accused shooter's alleged message. Apparently it's about 1000 words long and I haven't found it in its entirety but that's probably out there. Most folks are just discussing the part in the meme here and also the parts where he talks about who he considers a legitimate target (essentially just Trump admin officials and people who shoot at him; no one else).