how to oppose the allure of cruelty?
Value life itself, and health.
Life and health are higher values than money. That's where the need for public health insurance comes from. That's where laws against murder etc. come from.
But you can't take this understanding for granted anymore. You have to think about it, and teach, and learn, and promote, and discuss it everywhere in society.
Note that this does not depend on a political party. You are allowed :) to, and you actually should discuss values with people from both sides, and more.