If you're a real 2nd-amendment absolutist, the police shouldn't have stopped him in the first place, since they were stopping him for looking like he was carrying a gun. At least that's the current report. Apparently, according to Illinois laws, he shouldn't have owned a gun, and he shouldn't have been carrying it around in public either. Didn't have the right cards and permits. You can see where he might not want to get arrested and searched.
Maybe had a good reason for being armed, even though he didn't have the right permits. So, provisionally, I feel bad for him. But once you start resisting police arrest and once you start looking like you're grabbing for a gun, your life expectancy is unfortunately shortened. It's a brutal fact of life in the big city.
Think very hard before you resist arrest.
Compliance with the law is usually best.
CORRECTION: As of a day later, it looks like he did have the card from Illinois that says you can own a gun, what we call the FOID card (Firearm Owner's I.D.). He just didn't have the concealed carry permit.