Defending Mark Renshaw

Since nobody seems to realize the other side of the story on the Renshaw disqualification, I thought I would take the liberty to tell Renshaw's side of the story. Disclaimer: This DOES NOT mean that I believe he was 100% correct in headbutting Dean. I am simply telling his side of the story because he does have some legitimate points. Disqualification is a serious matter, and should not be handed out unless absolutely necessary. I will give you 4 points, supported by evidence, that show that Renshaw may not have been totally in the wrong. (I apologize for the poor quality of the photos. They are my own video stills, so the quality may not always be great.)
Point #1
Renshaw did have his line first Renshaw and his HTC leadout train were already established a few hundred meters or so before Dean and Farrar moved up. This means that Renshaw had already chosen his line and had the right to stay in that line. The rule of thumb for bunch sprints is that a sprinter must choose a line and stay in it, and that is exactly what Renshaw did.
Point #2
Dean was the first to make contact.
Dean was actually the first to stray from his line and encroach on the line of Renshaw. This photo shows Dean trying to subtly shoulder Renshaw away from his line (I am NOT saying whether it was intentional or accidental, just stating that it happened). The fact that Dean was encroaching into his line was likely the reason Renshaw felt the need to headbutt him in the first place.
Point #3
Renshaw stayed on his line throughout the headbutt
This yet again shows that Renshaw's headbutt had no intentions to impede Dean or cause an accident, but rather to get him out of his (Renshaw's) line. He knew it would soon be time for him to pull out of the way for Cav, and that Cav would have nowhere to go if Dean and Farrar managed to muscle their way into his line.
Point #4
Inconsistency with Officials
Shouldn't it be the same for one as for another. I am not saying that headbutts are an acceptable form of conduct, but neither is a fist fight at the finish line and there was no disqualifications for that. (referring to Barredo-Costa incident)
Once again, I am not calling out Dean or anyone else involved in the sprint, but just saying that disqualification may have been a bit too harsh considering the actual incident itself and the circumstances around it.