I can understand the argument that I shouldn't be upset with my cat because he claws my feet under a blanket; it's his natural instinct.
I can't understand the argument that I shouldn't be upset with a human being because they're stupid, and make stupid decisions. Humans are capable of introspection, education, and change.
I don't think it's unreasonable to expect more of my fellow humans than of my cat.
But I guess I won't be mad at you.