I'm a huge fan of Pacquiao and have never really like Mayweather. I'll openly admit he is a fantastic boxer with great talent but I've never liked him.
In my opinion however I believe Mayweather although many people disagree was right to hit him at that point. Ortiz's headbutt was on purpose and
there is no rule that states you have to "hug it out" after such an incident. The referee had restarted the fight so all is fair in my opinion.
Mayweather is a cocky, money hungry, greedy piece of shit. The headbutt by Ortiz looked accidental, but that still doesn't justify it. He apologized and was showing good sportsmanship; afterall, it is a professional sport. When they did however touch gloves again, it looked like Ortiz was still not fully in the fight because he was seemingly sympathetic and looked like he was still trying to apologize. Then Mayweather just throws that fukn hook, and then follows up with a right straight, K.O! That shot imo was a cheap shot because even the referee looked like he wasn't fully there yet. If you see it in slow motion, he doesn't even realize what happened until Ortiz was down, then he looks at the other refs like "wtf?!?" and begins to count. Either way, I just wanna see him fight Pacquiao, he'll finally be 42-1. Best part of the whole event was the interview when the old dude (idk his name) says 'If I was 50 years younger, I'd kick your ass!' haha lmao.