The white supremacist teacher converts the entire school into becoming part of his neo-Nazi cult and they proceed to either blow up a Puerto Rican bingo hall, kill the nerdy character for going on a date instead of joining their egging a pride parade rally resulting in the FBI arresting everyone, or Muslim activists burning the entire school down with them alive inside after their chants and manifestos get uploaded to the internet.
The teacher who converts them is named Mr. White, if that tells you anything.