And unless we get rid of propane, LNG , and natural gas, there will always be the risk of FAE bombs.

Gasoline is another high explosive compound. Fuel oil and fertilizer,and a number of household chemicals as well. Then there are the home-made chemical weapons that any high school student could make. I guess we need to control access to all of these things, since they present a danger in the hands of the mentally unstable.

Or we could try to raise a population that does not consider mass murder
as a reasonable way to resolve differences.

Naw, let em just riot and tear down what they don't like, and beat up those who have views they disagree with.