Explain how americans came to associate union members with extremists.

Many strikes that were led by the labor unions had several acts of violence, some that were started by the union members some that were just a response to acts of violence led by employers. The employers started to picture union members as extremists that only wanted more money from employers. Most of the time, the union members were linked to socialists and the Soviet Union.

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.

it proved indian land claims were unjustified.