In dealing with people who support genocide, ethnic cleansing, mass murder and rape – we should follow the Anglo-American precedents that proved highly effective in the 1940s. One technique is best exemplified by the bombings such as those of Hamburg and Tokyo, Dresden and Hiroshima (the latter more than anything else convinced the Japanese they were not racially superior and destined to enslave their neighbors). Another technique used widely in Europe involved “hanging” (not necessarily the humane form the Brits favored), and of course we should remember the “blind eye” that many Allied commanders turned when the soldiers executed those who had been involved in running concentrating camps.
The reality the “liberals” among feel to realize is that you can’t argue with a racist bent on killing you. Debate doesn’t work on such people.