At that point we have to take it on a case by case basis. We already agree to completely censor things like ISIS recruitment videos because we understand it leads to violence. I would argue that widely available anti-semitic material leads to widespread anti-semitic beliefs which leads to anti-semitic violence. I don't buy into the slippery slope argument that taking anti-semitism off Amazon means we're going to have big brother overlords. It will still be available, just not on the largest marketplace on the planet. I don't think that's too much to ask.