Road Rage

So this “morning” during my commute to work (morning being relative), before I’ve even gotten 20 feet out of the driveway of my apartment complex, I signal to turn right at the next intersection, and as I turn, the guy who’s turning left in the lane in front of me flips me off and screams something at me I can’t hear.
I assume it’s because he assumes I didn’t signal, because my blinker in the front right doesn’t work, and I just made him lost five whole seconds of his life because he could have turned earlier if he had seen me signal.
Is this really a reason to yell at someone and flip them off? It’s totally out of my control. I consider myself to be an above average driver, especially on the freeway, but how does it bode when, first thing in the day, a random guy yells at you for no reason of your own?
*sigh* Wednesdays.