americans are pretty uninformed in the subject, so they'll believe whatever pbs tells them. That includes the turkish "historians" that'll be having a concert after the movie. Unless their propoganda is given the proper response by known historians, they should not air the "dabate". But the very fact of airing the debate plays in turkish hands even if it's contested. Because they'll be questioning facts, and thus making the genocide debatable. And i doubht that in their search for 50/50 objectivity pbs will let any one of the sides to take over the other, even if they know that the armenian side is right.
Remember it's turk's goal to make the genocide debatable, just like they were attempting to do last year by holding a conference