I’m more concerned about how a 23 year old loser gets ahold of explosives and detonation devices.
Internet. Everything you need to build such things is found at a grocery store.
When I was 12 years old I used to make my own explosives and detonation devices.
Odds are you have the materials needed for a weapon of mass destruction scattered throughout your residence. Perhaps a binary poison gas device (household cleaning supplies plus a few other common items), or an explosive device (if you have lawn and garden supplies and equipment). It’s not rocket science (although model rocketry as a hobby can give you a whole new range of options.)
A high school education, an internet connection, and a neighborhood Walmart is pretty much all you need. WARNING- the internet searches will be tracked, and the Walmart has hundreds of cameras tracking and recording your every move.
Putting together something that will blow up is pretty easy to do.
The tricky part is in knowing how to not be there when it goes off.
[I’m more concerned about how a 23 year old loser gets ahold of explosives and detonation devices.]
The garage and kitchen.