The very video you viewed where Ziegler was arrested reflected John's commitment to exposing Liberal hypocrisy.
It's alright if you don't like the guy as that's your personal preference. From my standpoint, I wish there were more like Ziegler or Mark Levin. Conservatives who walk the walk and provide substance to Conservative beliefs.
However, it's possible to make good points without being a loony confrontational attention whore.