Wasting police time (I mean, not much - I'm not exactly concerned but it's still not really on), so you can encourage others to be outraged when the police are polite enough to pretend they'll take you seriously.
And, yeah, it's pretty woeful that Pie is going along with this person's nonsense.
It's in the public interest to see how the police respond to this video.
Given the result of the Dankula prosecution, it's reasonable to expect similar for Jonathan Pie.
As an aside, we're already seeing the smearing of him as a Nazi sympathizer for defending free speech here. It's disgusting, but that is the mentality of some people. Pie standing up for Count Dankula, who was himself only guilty of doing an unfunny prank video and is being smeared with guilt by association, is crazy.
Remember when Noam Chomsky was in favour of allowing holocaust deniers free speech rights? Is he a Nazi?
People don't seem to get that in order for you to be for free speech you must defend the rights of people you don't agree with, even if you think they are digusting.
If you only defend the rights of the people you deem as worthy then you don't truly believe in those principles.