Because right wing people love being parodied, don't they? As others have said, parody is fine if it is funny. That wasn't funny in any way and the fact that anyone thought it was worthwhile sharing it on here is concerning for them.
It's hardly surprising. It is written in the Spectator by someone you would imagine is under 10 and sulking. Rarely have I seen such a pathetic article (although maybe article is too strong a word for it)