That is one angle, but who doesn't know how to make at least a
Molotov cocktail or something simple like that.
A Molotov or a self lighting one? Gasoline, sugar, pemanganate and....
What's weird is that absolutely anyone with a bit of experience in practical chemistry can use very ordinary household chemicals, and/or chemicals commonly kept in a high school chemistry course, to make lots and lots of things go 'boom' or catch fire.
Naturally, only some tiny fraction of people who've taken any chemistry course actually do go out and do this, but, if you consider the matter, this sort of action is just the same as homicide, arson, or both. The only difference is the weapon used.
Like Anti-Bubba said, it is hard to believe that there are people who don't know how to make firebombs. I would never make one myself and will not explain how, as it appears you can get into trouble for that. A Google search would probably reveal many more ways than I am familiar with in any event.