why did Massa turn in, why didn't he make his allowed defensive move and cover off the inside, why did he open a barn door and invite Hamitlon in just before the turn, why did he then decide to close the door too late, knowing that Hamilton was there. Why watch him all the way and then STILL turn in.
If you open a door to someone on the inside going faster than you then you MUST expect them to take it, if you then move across the front of them then it's you who has made the move that's caused the accident. Only one driver caused it, the driver doing it, only one driver could've avoided it, and it was Massa and, surprise surprise, he decided a crash was a better outcome than being overtaken, which is actually fairly usual for Massa this season.
If you open a door to someone on the inside going faster than you then you MUST expect them to take it, if you then move across the front of them then it's you who has made the move that's caused the accident. Only one driver caused it, the driver doing it, only one driver could've avoided it, and it was Massa and, surprise surprise, he decided a crash was a better outcome than being overtaken, which is actually fairly usual for Massa this season.