I'm not saying there are no universally illegitimate sides, but even those have their supporters and some reasonable arguments. The focus should be on deconstructing these arguments instead of marking the side as illegitimate.
I don't have an answer for how to identify good ideas that's convincing to everyone, especially in the flimsy-whimsy domain of politics, but I believe there are always more than two sides even if it's presented that way. There are uncountable many "sides" and most of them are bad, wrong, and insane. And to entertain all of them in earnest under the pretenses that we're being fair is a paralyzing waste of time.
Even for a comedy show. It's not really about the show anyway but the bigger picture of politics that it fits into.
Like that National Association of Marlon Brando Look Alikes.
>The focus should be on deconstructing this arguments
I wonder what arguments you may see here and what the possible deconstruction may look like.
Consider a debate about the existence of God. A theist person might say 'everything must have a creator'. One deconstruction could be that the proposed God does not seem to have a creator.