That book/article is a load of bollocks.
I actually laughed out loud at his 10-minute 'test' to 'prove' we are living in a simulation. Has this supposedly educated person never heard of jpeg artefacts, antialiasing, or any other of the many anomalies that appear in digital photographs? He classes the 'weird outlines' of his finger as something that doesn't occur naturally and must therfore indicate a simulated reality. It's a PHOTOGRAPH, FFS!!! Does he see the outlines with his normal vision? I certainly don't, do any of you?
As for his nuclear bombs being a signal to 'galaxy-wide' aliens that we are destructive, and must be either avoided or destroyed ,is pure bunkum. The first serious detonation of an atomic bomb was in 1945, so the signal that this has supposedly produced will only have been travelling through Space for 77 years ............... hardly 'galaxy-wide!' I seriously doubt that any aliens (assuming they exist at all) will have received signlas from us (that can only have been generated in modern times) and had time to act on them before the human race, or possibly even the entire Earth, has suffered extinction.
And whats this doing in a Flat Earth thread anyway?