Hamilton ran all the way out to the curb with Rosberg next to him, FIA rules state that there was a significant portion of the car next to him, if Rosberg wasn't next to him there wouldn't have been a collision.
The incident was 50/50, both drivers could have avoided the collision, Rosberg had the greatest opportunity to avoid it, but he was entitled to try and make a pass.
When the contact was made there was not a significant portion of Rosberg's car alongside, as they came past the apex it was just the front wing along the rear wheel and there is absolutely no imperative at all to leave space, Rosberg would have needed his front wing coming out of that corner to be pretty much half way alongside Hamilton's car... it wasn't. It's a right hand turn. Just because people want it to be so you can't magically turn tighter than the car allows. As you turn through a right the car will swing out to the left of the track. Has anyone ever hugged the inside line of the straight following that corner, never, because the cars can't. Hamilton was turning right as much as the car allowed the whole time, there was no possibility to turn tighter. Had he tried he would have either lost the back end grip and hit Rosberg, or he could have slowed down to turn tighter, in doing so he would have caused Rosberg to hit him.
Turning left or reducing how tight you were turning right were the only options, with a car on your outside the inside car CAN'T do this as it causes contact, the outside car can do this easily. Rosberg could have moved to his left, Hamilton couldn't, Hamilton couldn't turn any further to his right, nor slow down, Hamilton had absolutely no options at all.
Rosberg could have slowed and wouldn't have caused a collision, he could have turned to his left, and not caused a collision, he could have stayed the way he was going and not caused a collision... instead he turned right with 100% chance of causing a collision.
Senna said not going for a gap is no longer racing, he did NOT say going for a gap that doesn't exist is racing, or that not going for a gap that doesn't exist is racing. Down the straight, fine, he never had the overtake once they turned in, hitting the apex there was NO gap regardless of what Rosberg says.