Why would he be enraged 5 months later? If anything, he should've been angry when it happened but from what I understand they were both over it and moved on. We know that Michelle felt humiliated appearing on the show as per her mom. Judge Milian called them both idiots. It was his choice to go on PC. He knew how the Judge ruled. He knew what was said about him in court. Why would he tell his friends to watch and then murder Michelle on the same day it aired? Actually, if we go with the timeline, it would've been only minutes after it aired. Really? Is he that stupid?
I agree. I'm sure this wasn't the first time people teased Dale about being a star wars fan and as far as we know he hasn't killed anyone over it yet. In fact I'll bet he gets teased all the time and is quite used to it. Plus he wanted his friends to watch. I just can't see Dale thinking man I looked really bad to on pc I think I'll kill Michelle when she gets here.