Andrew Mitchell's fate was decided by a group of Tory MPs in what is being dubbed as the "battle of the tea room", reports the Independent on Sunday.
The Chief Whip resigned on Friday, four weeks after his rant at police officers.
Witnesses to the turbulent scenes in the Commons tea room and the 1922 Committee meeting last week said the majority of the 148 MPs elected to Westminster two years ago "signed his death warrant" by draining support from the Chief Whip.
One senior figure said Mr Mitchell had "completely misunderstood" the ferocity of "the 2010", as they are referred to in Westminster.
The group, making up about half the Tory parliementary party, was instrumental in Mr Mitchell's decision to resign over "plebgate".
David Cameron admits it 'became apparent' to the former Chief Whip that he could no longer do his job. So why was it not apparent to the PM?
Government Chief Whip Andrew Mitchell has resigned after swearing at police guarding Downing Street.
Losing one's temper with a police officer would be excusable in most people, but for the Tory chief whip to do means so much more.