Or you could look at it a different way. Ethical purity almost always results in apocalyptic cleansing. True believers, are almost always hurricanes of righteousness “killing in the name of.”
Nice hot take, don’t get me wrong, but what Game of Thrones gets right (more than almost anything else) is that human beings are complex and capable of great evil or incredible compassion at all times. It is in the creating of binary boxes like good vs. evil where most massacres start.
Cruelty is common place, but genocide comes from the place White Walkers live (unbroken purposefulness).