Don't be too harsh on Mike.
True. It's kind of like kicking a blind, three-legged stray dog with bladder-control problems.
Sure, it's funny. But out of context people might take it the wrong way.
"Good evening. I'm playing the role of Jesus; a man once portrayed on the big screen by Jeffery Hunter. You may remember him as the actor who was replaced by William Shatner on Star Trek. Apparently Mr. Hunter was good enough to die for our sins, but not quite up to the task of seducing green women."
-Stewie Griffin