Abe had my ancestors in chains I don't think that he was untouchable.

Abe is a large reason why the slaves were freed. I've never heard anyone say otherwise until now.
And the idea is NOT insulting. Insulting to whom?
The south at that time? Portraying them as vampires that sucked the blood out of innocent men and women? I don't pity the South.
To Abe? Fighting against the South and trying to free people which got him killed in the end? That makes the guy a god damned superhero in my books. All this movie is doing is, via metaphor, showing how much of a HERO Abe really is. The movie isn't Abe fighting vampires unless you look at it from a VERY simplistic viewpoint - this movie is about Abe risking it all to fight the slave-owning SOUTH.
I have no doubt Abe would see the film, enjoy it, and think it was clever how they used his own real life struggles in a metaphorical way.
If it was just Abe fighting vampires with no meaning behind it - yeah, that would be insulting. But, IT'S NOT. It's Abe fighting the blood-sucking Southeners. This movie is a lot more historical/metaphorical than it is silly. And yeah, Abe? Would like it. He'd understand it.
This is coming from a Lincoln fan who was afraid it would be insulting - BEFORE reading the script and realizing how rich it really is.