Actually first he got irritated because he had just gotten off an international flight and came home to his door being swollen shut. Then he had a cop show up (doing his job) asking to enter his house, then question his identity and whether he even lived in his own home. Then he got angry and lost control, and took the shouting match into the street where it could be considered disorderly conduct. Then, after he was held in police custody for four hours before being released, went home and blogged about it. That's when Gates brought race into it.