Could it possibly be that they hate you because you represent an occupying military power that has been shown to use torture and to have killed those it was claiming to be protecting/freeing.

And however you feel about it, it is their culture not yours, seeking to change it by waving a gun in their face is even less likely to endear yourselves to the Iraqi people, they are a devout (whether you like it or not) people with a long history of which they are proud. Claiming to know better while driving around Baghdad in your tanks will not win hearts and minds.