Huh. Just goes to show you, people are different, and care about different things.
There's a million reasons why I'd never vote for Trump. But him attacking the Khans wouldn't make the top 100 on my list. It wouldn't even make the top 100 of "worst things he's said/done," to me. Maybe it's #1, or top 10, or something, for you.
People find things to be of different import, based on their life experience.
That may be why you aren't understanding the people who don't find it as big of a deal.
Yeah, it was a dick move. Okay? He's done a lot of dick moves. It didn't surprise me (in fact, I expected it, when I heard the speech, that Trump would lash out--did you really think he was going to take what they said quietly?), and while it was disgusting, again.. okay?
Just trying to give you a little insight into why others are meh on it. :)