With all due respect Parn, I think that it's safe to assume that some of our nation's xenophobia could possibly trickle into the police force. Perhaps some of the blame should be on him, but after he's on the ground from being tazed, and then they taze him again for not not getting up, that's excessive force.
With all due respect, the chances of all three officers being anti-Iranian-American are kind of slim. This kid isn't the first not-generic-white-bread-American to get tazed by authorities in a situation where it wasn't necessary. The only reason there might be xenophobia involved is because it involved an "Iranian-American" and people are accustomed to associating racism to events like this, and headlines mentioning a person's descent doesn't help things. If he had been from Oklahoma instead, most of us probably wouldn't have heard about this event.
You also need to read the second paragraph of my first post in regards to your second comment. Of course it was excessive force.