smth2345

> Buddhism has a fairly explicit prohibition against killing

It is easily worked around by dehumanization of your opponents. In buddhism such people might be considered icchantika for example which is basically someone who can never reach Nirvana and thus killing these "non-people" is akin to exterminating pests.

Obviously, there are many ways to dehumanize someone and sadly this is happening in many societies around the world right now.