I can tell my children, definitively, that the man we call president is a bad person. Can I say that about their grandparents, who support the same ideas? But what if it’s true? Perhaps this is a pat rendering of a real-life conundrum. We talk about good and bad guys in the movies, but actual people are dynamic and complex. In real life, I like my mother-in-law. She’s unintentionally funny, and says “darn” and “fudge” and “shoot” instead of swear words, and she can’t remember her email password, not ever — even though I know hers by heart. My father-in-law and I share a lifelong love for the Yankees. He’s a former runner, and while I still like to say “current,” if I’m being honest, I’m a former runner, too. But I also find their politics — and how they manifest in what they say and share — repugnant. This is a matter, now, of fundamental human decency.