Although we usually think of the Ku Klux Klan as an anti-black organization, there was a time in history where their big thing was nativism.
This was in the 1920s and a bit before that. During that time, American culture was changing rapidly. Especially in the cities, new forms of entertainment were springing up, and people were having more leisure time. This led to a new culture with flappers and other such examples of a new morality.
The KKK and others blamed this new and (to them) immoral culture on the effects of the immigrants who had come since the 1880s. Therefore, the KKK came to have a slogan "100% Americanism" and to be mainly a nativist group.
Given this information, you should be able to use both words in a sentence.