The impression of the Conditt character Im reading is one of a Jeckyll and Hyde type. By day, an upstanding and likeable young man. By night a cunning but troubled young adult.
There are folks out there who can pull the wool over the eyes of family and friends, so the idea that he can be a regular dude by day and a bomber by night is not so far-fetched. But there are enough gaps in this guys character (what little we know) that Im surprised that a jobless, home-schooled Millennial with no prior record or known issues (again, as he is presented as not having) would think up and embark on a bombing campaign all by themselves. And that the authorities are seemingly so quick to close the book on it.
Lets loose the flowery words...this guy was also considered so....