For the bomb example, the barrier of entry is just sourcing of some chemicals. Wikipedia has quite detailed description of all the manufacture of all the popular bombs you can think of.
Did you bother to check? It contains very high level overviews of how various explosives are manufactured, but no proper instructions and nothing that would allow an average person to safely make a bomb.
There's a big difference in how many people can actually make a bomb if you have step by step instructions the average person can follow vs soft barriers that just require someone to be a standard deviation or two above average. At two sigma, 98% will fail, despite being able to do it in theory.
> Yeah, if US military gets any substantial help from Claude(which I highly doubt to be honest), I am all for it.
That's not the point. I'm not saying we need to lock out the military. I'm saying if the military finds the unlocked/unsafe version of Claude useful for planning attacks, other people can also find useful for planning attacks.