Honest question: when did they stop saying the pledge in school? I was still saying it in 2006 when I graduated, and I heard talk of them trying to stop it but never knew that it happened.
But anyways, I don't think it's as much of an issue of respect as you are trying to make it out to be. He didn't say he wanted to skip the National Anthem explicitly because he found it unnecessary or because he just doesn't like it. They wanted to use as much time as possible to cover important issues that they felt needed to be discussed. This is just my opinion, but I think that spending more time discussing what we need to do to fix the problems our country is facing right now is just as respectful, if not more so, than singing the National Anthem.
But what do I know, I'm only a kid (not directed toward you, Rick).