Fascism is a composite idea, philosophically. Logically, it's first contention is that the individual is subsidiary to the state, as in the collective is something greater than the sum of its parts. Secondly, fascism holds that the purpose of the state is to protect the interests of a culture or ethnicity deemed ideal for the state.
Now, to answer your second question, yes and no. No for the United States, Canada, etc. Yes for the European states.
In Europe, since the World Wars, the borders have carved out nation-states with essentially one nationality within their borders. The last large poly-ethnic state, Yugoslavia, fell apart at the seams during the 90's due, predictably, to ethnic tensions. This makes Europe the prime breeding ground for fascist thought because each nation has a one-nationality identity with centuries of culture and tradition: ergo, exactly what a fascist government would want.
The United States, on the other hand, is completely incompatible. The society of the United States has, since it's inception, been fiercely individualist and demands no less than equality, individual freedom, and personal liberties. The idea of collectivism is abhorred as a relic of the Soviets & the Nazis, and the idea of one ethnicity being held as the ideal is contrary to the belief that most Americans hold, which is that an idealic society would see no differences based on race, nationality, gender, so on and so forth.
I hope this is a competent answer.