It's a BB gun. You should be able to separate a movie/musical about a boy who wants a BB gun and a tragic event that happened with a crazy guy who shot up a school with high powered automatic guns.
I can separate the two and still manage to think "Hey, it's really something that one of our most culturally beloved Christmas stories involves a kid wanting a gun." Correlation not causation, blah blah blah gun culture whatever.
Although wouldn't it be nice if we lived in a world where the worst a gun could do is shoot your eye out?