Simple. I think you'd need to prove Russia's votes were in exchange for bungs. If there any evidence that the votes for the Iberian bid were also in exchange for bungs, then I'd agree they shouldn't get it either.
If Russia are stripped of it, it should go to Spain/Portugal as that bid received the next largest number of votes. If they didn't want it, then the Benelux bid should get it. If not them, then us.
I still maintain that the travesty of the 2018 award pales into insignificance when compared to...