From my experience politicians are much more uncomfortable being made fun of than they are being preached at and screeched at - you know and the soapbox routine. They're much more uneasy knowing they're a target of ridicule.
My humour has always come from anger but I have to make sure I don't just get angry and jump on a soapbox.
My dad had a church of 90 people when I was born. It was just over the years it continued to grow.