Honestly, people behaving like Homo economicus is how you get MAGA.

Think about it. Isn't Trump's pitch to voters ultimately an argument in rational self-interest? It's all "I'll make an in group and an out group. You'll be in the in group. I'll pull up the in group while pushing down the out group."

Racism and sexism are rational. Or at least they are rational from those that benefit from them. Think about a white male living in the Jim Crows South. Your life was made soooo much easier by racism and sexism. There were whole career fields where they were the only quarter of the population that were eligible for them. They were automatically in the top quarter of society, simply by their race and sex.

Anti-immigrant zealotry is rational. If you're a native-born US citizen working in the construction industry? Every legal or illegal immigrant being deported would cause your standard of living to soar. Economists would tell you that on net it will harm the economy. But if suddenly the pool of construction workers is cut in half, any US citizen who knows how to swing a hammer is now rolling in dough. That's the rational terror of fascism - every time another group in the "first they came for" poem is liquidated, someone ends up with their property, their jobs, their place in the social order, etc.

You NEED to have a respect for persons built into your ethical framework, or else you can end up justifying evils of all sorts, all in the name of the greater good. Hell, Dr. Mengele slept well every night, content in the knowledge that he was doing the greatest good for the greatest number.