Wikipedia was your source, huh?
When I first saw this on newgrounds' front page, I was interested in what you were going to make a point about the shootings. Unfortunately, you disappointed me greatly with the inaccuracies of this animation. During your credits, I found out why this is so far off of the truth.
I like Wikipedia. I really do. But when you depend on it for the main source before you go off and make an animation that, so far almost 50,000 people are going to watch, I get a little upset. If you actually care about learning anything about Columbine, I suggest you read 'No Easy Answers' by Brooks Brown. Of course, because you didn't read that, you made up bullshit to fill in the holes of what you assumed happened on that day.
First off, you didn't even scratch the surface of the 'why' question. The character 'Dane' in your animation, which is a character meant to portray Brooks, DID NOT see Eric and Dylan in bulletproof vests and carrying guns when he left after 4th hour Chinese philosophy. He saw them dressed in their somewhat usual attire, black clothing. They had bulletproof jackets underneath, and they were carrying their weapons in duffelbags.
Second, you didn't get the video games deal. Third, you missed the mark on the 'Do you believe in God'. I'd love to tell you why, but my 4096 character limit is about up.