it states rather clearly in official documentation/citation that Salman Rushdie was awarded a knighthood for services to literature in the Queen's Birthday Honours on June 16, 2007. Which I think supports my "position" rather well

Sure, it supports it. But it doesn't prove anything. Sometimes governments lie. We know this for a fact. And neither of us can prove one way or another whether or not this is one of those cases. Your opinion is that they are telling the truth in this case.