[Kizzy]

Um.... I'm going into full snowflake mode on this :/

It just looks like the immature rantings of a loner kid to me, unless these plans were waaay more sophisticated than we see here and/ or he had made purchases of items to be used in an attack I can't see the reason for the sentence.

Those 'instructions' are made from information freely available CONTEST strategy and are well known targets requiring contingency planning.

Not saying there should be no action but putting young impressionable/ vulnerable mind into that environment? ...he comes out in his 20s and what?...