Most people in the USA are not Americans. While they might be American citizens but by the very fact that they hate America and are doing everything they can to destroy it means that they are in fact not Americans.
To be an American means to have a minimal degree of loyalty. The teachers unions, the welfare moms, the fem-nazis, the socialists are not Americans in any authentic sense.
Therefore real Americans ought to be aware that they are at war with an enemy that is already in the gates.