I just think you are both assigning villain no where near enough of a bluffing range. He can easily chose to float a flop with a tonne of his peel range. He essentially turns gin if he is going to bluff, and I agree he has a tonne more

than we do, but that's the point where he wins the hand, which makes bet bet bet/fold OOP absolute folley.
Well we are essentially agreeing on the hand then if the only thing we disagree on is his bluffing range, for me personally I don't think we can beat ANY value bets, and I don't think he is bluffing with a frequency high enough to make calling KK and profitable call. If you think he is bluffing more often, and he every once in a wihle have a worse hand for value, then you absolutley should call KK here.
There isn't really anything that's been posted or information that's been given to make me reconsider my assumption, it's a totally broad assumption made with limited information, so could well be totally wrong, but i think that would be more standard, we need people to show us they are capable of things before swerving from the "default" assumptions for spots like this. If you think that the "stnd" 400nl Rush reg is turning 88 into bluffs here or float float jamming 89s or something, or shipping TT for value then I'd be EXTREMELY surprised if that were true, but I never played these games, so couldn't comment with any intelligence.
One thing I will say though, if you think the reason that he will be bluffing here is because we folded KK to him, so he feels like he has free reign to shove hos whole range profitably then you're wrong, even if we're folding too tight were not "exploitable" and he does not have a profitable jam with his entire range, simply because our range that gets to the river is strong enough.