Gore Vidal, to take one example, didn't make his fictional Abraham Lincoln the composer of Beethoven's works who marries Julia Roberts. Why not, it's FICTION, people?! Might of sold 40 million copies with such turns of plot! Brown fiction is not only blasphemous, it is prepostrous and should have been tossed in the shredder by the publisher before the printer saw any of it. But it's also bidnys, it's about money, the lowest common denominator of taste, and not about literary or educational value.
But what would be wrong with doing that? Actually the idea is kind of interesting. That's one of the uses of fiction it seems to me - to play around with ideas, sort of ask "what if?". So what if it's not true? That's why they call it fiction.
The gays are already taking wild license with Lincoln - and about every other historical figure - claims them as gay - and not claiming their convoluted and disingenuous claims as 'fiction'
Are you upset about that?