Jim is a comedian. He doesn't owe anyone shit except for a few laughs and entertainment. Sargon doesn't fucking get that. Politicians, even good ones, don't win fights with comedians, ever. And Sargon is a shit wannabe intellectual who wants senpai Farage to notice him. People ragging on Jim for just taking potshots at more "accomplished" people are missing the point - would you say Bill Hicks was a failure because he didn't enter politics? No, because that wasn't his job. His job was to point and laugh and expose stupidity and hypocrisy, and that's what Jim does too, in his own 21st Century shitposter way.
Newsflash: The fact that UKIP will entertain the likes of Sargon shows how far UKIP has sunk, not how far Sargon has risen. Since Farage's departure as leader and since the Brexit referendum, they have lost all leadership, all sense of purpose and have been btfo at every election. Their internal disputes literally descend into fistfights in the European parliament building. UKIP's moment in the sun is long over, they are a dying, squabbling embarrassment to what they once were. So much so that they'll even let Sargon play politician like some Make A Wish Foundation kid who gets everyone to pretend he's Batman for a day before the cancer consumes him.