I don't remember ever hearing about Hassan not getting along with others. What I remember was Hassan getting heat because he refused to do something on TV.
Then WWE management spun it around after he was taken off TV and blamed him for the angle not working. Claiming the character would have worked with the right talent.
Anyway, the Hassan character was really good at first. He came out in a suit and tie, saying he was American and was tired of the racism. It was hard for me to look at him like a heel.