Thorin is (at least at this point) the leader of the party that Bilbo (the title character) is a part of. This means that his enemies are, at first meeting, Bilbo's. Thranduil will be introduced as an antagonistic figure, and so it's appropriate that he be, if not menacing, at least intimidating. Later on, he and Thorin will bury the hatchet at least long enough to fight goblins together, and the Elvenking and Bilbo become friends, or at least exchange kind words and gifts.
So it's fitting, and entirely book-canon, for the Elvenking to seem hostile at first meeting. I don't think there's any reason to blame that portrayal on anything in LOTR. If they'd used the "Galadriel lights" for Thranduil, that would be another matter but as far as I can see they didn't.