Not saying he should have been found guilty....from the beginning my point is he might have avoided the legal trouble if he had not been the first one to introduce a weapon. IF, IF he drew his weapon earlier in the event, before he was getting choked out, as the article states then it could be argued that he was the aggressor...and it's possible that the responding officers and the DA went with that....
Obviously it wasn't as cut and dried as a homeowner innocently being attacked in his own driveway or it wouldn't have played out so long as evidenced by the recent shooting in Chandler.
I see where you're coming from, but if I have 4-6 drunk, aggressive, loud, obnoxious and threatening males in my driveway, I am going to feel threatened. I am going to be in fear of my life or great bodily harm, or that of my family/friends. A single punch can physically kill, and when he took the crack on the head from being tackled, that could have been 'game over' for him.
Just my opinion. If he turned his head and got tackled, he let his guard down too long. I, too, would have been tempted in the situation described to possibly bring a weapon out. It is not a talisman, but it can be used to deter the possibility of physical violence, if it is being threatened.
IMO, he should have paid more attention and plugged the guy who was charging him if he had the chance. Anyone who aggressively charges you when they KNOW you have a deadly weapon at hand is obviously escalating the situation and knows they are risking their own death.
The pepper spray... I don't know where that came into play and what the circumstances were of its use in this instance. To me, pepper spray is more useful to help escape a dangerous situation (aka my wife being attacked in a parking lot) or to buy time to get to a more definitive weapon. Sort of like using a pistol to fight your way to the trunk for your long gun.
Either way, from the sound of it, I am glad this fella made it out eventually, but he certainly didn't come out unscathed.