Who's going to care if Randy RKO's his pops? Especially after a 1-time screw up?
As for the Orton hate, and maybe I'm just speaking for myself here, but the guy is just a white bread generic dude. Nothing really stands out about him, except for being a pretty-boy, he's average on the mic, and he's just average in the ring. Normally, that would just lend himself to the realm of apathy, but when you add in the fact that they've been pushing him hard for close to 2 years (despite it not being warranted for most of that time), that's where people start hating on him.