Still, there are specific historical proofs that every religion, including Buddhism, can be used as an effective framework for supporting violence:
Sōhei were Buddhist warrior monks of both medieval and feudal Japan. At certain points of history they held…en.wikipedia.org
The book focuses on the history of Zen and Japanese militarism from the time of the Meiji Restoration through the World…en.wikipedia.org
Even the system in Nepal wasn’t pleasant for anybody not belonging to the privileged minority.
From my very personal point of view, the story of Buddha before Buddhism is simple: he grew up in Hinduism. If in Christianity you suffer until the day of judgement, in Hinduism you suffer because the lives are recycled, and you by nature get recycled in suffering lives too, and there’s no end! So “eternally being reborn” means to them “suffering infinite times.” Now Buddha discovered that he can get free from that: by simply not believing that religion, he is going to really die. That was so radical idea for the Hindu environment around him, that that simple state (being really dead, not getting reborn) was considered worthy of only “kind of” godlike persons that have to do something special to achieve that (that is the real meaning of “nirvana” — being really dead, not reborn), and there is then a whole religion with ore myths, rules and rituals made around that event of Buddha’s insight, which was widely mythologized and “religionized.”
Of course I, believing only in science, shall per definition reach such a “nirvana” — there’s nothing “spiritual” that will survive the death of my brain.