In several stories he did. In others it was because the romans were always trying to get their hands on it, and other druids weren’t always trust worthy.
Let's see people with firearms and weapons, opposing a one world government, run by people who regard themselves as better than everyone else... hm where have I heard that before. Almost sounds like what they call right wing conspiracies.
To be fair the ATF only moves in when they are right wing or religious, the lefty ones collapse on their own because they are made by the nonworking class.
That is how it always is with the dried up revolutionaries, they are still fighting old battles even though the world has moved on, just ignore him and walk on as he tilts at windmills.