Answer:
The characteristic that was true of native-born Protestants is that they comprised a large part of the membership of the Ku Klux Klan.
Step-by-step explanation:
The ideology of native-born Protestants is quite similar to the one of the Ku Klux Klan, and that is one of the reasons why many members were native-born Protestants since they truly believed that their actions of intimidation, violence and towards people from other ethnics of religious beliefs were the only way to save the land where they were living.