> not sure why so many people believe that what - jury nullification? - is going to happen

Eh, if I thought Mangione was justified or effective it would be an easy way to feel good for a while with zero real-world consequences apart from my moral integrity. (Which, to be clear, is mine and mine alone. I have friends–good people whom I love and respect–who would nullify Mangione. They're just never getting seated on his jury without perjuring themselves.)