I have always seen Edward Norton as something of a geek but that might have something to do with the name. He was quite convincing as the leader of the Neo-Nazi group. I wasn't to crazy about the way he was converted as it could have gone both ways in my opinion, but in the overall scheme it made sense.
The ending was foreseen but you had no choice but to be riveted. They developed it in such a way that the audience feels helpless. You know what's going to happen, you just don't know when and your powerless to stop it. A great effect. The actingh was fantastic on all accounts: Brooks was the perfect principal, Furlong was an amazing character and Norton was downright scary at times.
Great performances, good story, great writing...just don't watch it with the kids.