Well, I can start off by showing you this little bit from an article:
As is now well-documented, the whole fallout in the McLaren team began when Lewis Hamilton broke team policy by selfishly leading the train in the fuel burn-off phase when it was Fernando Alonsoís turn to do so. So the whole situation was really Lewis Hamiltonís fault ó not Fernando Alonsoís as most of the tabloids claimed.
With Hamilton having broken internal McLaren rules, the team tried to redress the balance to take away the advantage that Lewis Hamilton unfairly gained (and thereby remove the incentive for Hamilton to try anything like that again). What did Lewis Hamilton do? Did he take the blame, accept this slap on the wrists and move on? No. He actually indulged in an incredibly bad tempered rant against his own boss.
Lewis Hamilton: Donít ever f***ing do that to me again!
Ron Dennis: Donít ever f***ing speak to me like that again!
Lewis Hamilton: Go f***ing swivel!
That's from the big disagreement last year, which also responds to your argument about Alonso being the arrogant one.