They're Learning WHAT In School?

I was sitting in ap euro today, listening to Mr. Wade Johnson lecture us about Liberalism, Conservativism, Reactionism, Nationalism, and many other ism's. He was pounding the definitions of each one into our heads....Liberalism is wanting to change the government! Conservativism is not wanting to change the government! Reactionism is wanting to bring back old traditions and Monarchy! Nationalism is when a group of people that share the same race, culture, religion, language, ect...are together as one Nation. That got me to thinking about our nation, which, by Mr. Wade Johnson's definition, is not a nation. Think about it. Americans are of every race, culture, religion, language...heck! We're a republic, not a nation according to Mr. Wade Johnson. Honestly, idk...wtf man? That's what they're teaching kids in school these days.