Green Beret who told him this was respectful:
On why kneeling was better than sitting
“For me, that's a sign of reverence. You know, people take a knee to say a prayer. And then also, military personnel, it's very common to see an image of a soldier, or a marine, or an airman, or a sailor, take a knee in front of a fallen brother-in-arm's grave to pay respects. So I just thought it was better, and it showed more about — that he's paying attention as well, he's not, in a sense, sitting it out. He's engaged.”