The point of not dehumanising them isn’t to spare their feelings, nor to avoid “sinking to their level”, it’s because dehumanising them removes their responsability and accountability for their own actions, as well as ignores the systemic nature of the issues we’re facing, making it entirely counterproductive.

They very much ARE people, people who are choosing to harm other people for their own gain because we live under systems, invented designed implemented and enforced by people that actively and deliberately encourage them to do so, for the ultimate benefit of said hand full of people.

Rabid dogs have no choice, they are not responsible for their actions, they have no way out of their condition, and ultimately when they die, unless they bit another animal, the problem will not persist, none of which can be said for nazis.