The correct answer to this open question is the following.
This question is missing something important. The part that is missing I am going to include it in capital letters.
Identify domestic events that prompted ATTACKS ON civil liberties such as the Red Scare, Palmer Raids, Fundamentalism, Marcus Garvey Back to Africa Movement, and the KKK to those attacks.
Once clarified this issue, we can say the following.
I am going to choose the case of the Red Scare and the Palm Raids. The domestic events that prompted attacks on civil liberties in the United States in the times of the First Red Scare were the following.
The country lived in uncertain years in which the threat of the spread of Communism and Anarchism really affected the federal government and scare the American society because the government released propaganda campaigns saying that Communism was the worst thing that could ever happen in the United States.
Anyone could accuse you of being Communists or anarchists, and that was enough to be persecuted by the Police.
The Palmer raids started in November 1919 and ended in January 1920. President Woodrow Wilson had ordered to cease civil liberties to people accused of being communist or anarchists. So the Department of Justice arrested many people under the suspect of being those things. Many European immigrants, basically Italian, were arrested just under suspect, not because there was evidence of their conduct.
These were the times of the First Red Scare.