Eagle eye. From the quoted statement, I dont really see how you deduced his "lack of perfomance" could be a reason for his team mates putting him down. Maybe its the other way around. Maybe he rattled a few cages the way he played and there is no question about it there is a pressure group within the team that like their friends to stay in the team. Kamran happens to be a popular character within that clique. Maybe his brother Umar and the other remaining members of the Oath Brigade were not taking kindly to Haider because they felt he threatened their best mate's place in the team.
That statement can be twisted and turned any which way you like. I am just hopeful someone, Haider himself, media, PCB, Jack Sparrow, whoever, comes out with a statement soon to put all this speculation and conjecture to rest.
If there is not solid ground for his actions either he is severely unhinged or a celebrity status seeker.
If not, then we have bigger problems to worry about that bickering and fighting like children on internet.