We've yet to see if this guy was in touch with AQ people. Which I doubt as the opportunity endorsment came to confirm. They (allegedly some AQ affiliated group) took responsibility like a full fortnight after the first murder? What's that for "terror cell"? To me that's just a brainwashed tool that would kill anyone if "hope" was given back to him.
This man was fed up, and he wanted to go out in "style". I'm sure this guy 30 years before would have ended up dead on a hijacked El Al flight.
That's simply the issue with the crappy future he tailored to himself.