If anyone is to blame for Xavier's death it is the Avengers and specifically Iron Man. The goal of the X-men at the start was to have the Phoenix bond with Hope. Iron Man blasts the Phoenix, forcing it into the X-men. The Avengers then suddenly decide that Hope should have the Phoenix as it it were their idea originally. I used to be a huge fan of Iceman, but his ill placed anger at Cyclops has really made him come off like a tool. Where are the X-men that defended Jean Grey after she was possessed by the Phoenix? Marvel has a lot of weird double standards when it comes to how characters react to each other.
All of this - Also, when was the last time current timeline Iceman was in not ice form....?