Yeah, someone who intends to go around shooting people wouldn't start his "manifesto" attributing credit to someone else.
Realistically, if this was a legit person, psychologically, his opinions/mind are going to be first and prominent; he wouldn't be bringing attention to anyone else unless it were a foot note, buried deep. Not intentionally, he just wouldn't be thinking of someone else first and foremost…
Though we already know this is a set up.