Answer: it's because they tried to eliminate difference in the efforts to create a homogeneous mythologized unitary polity
Explanation:
Containment is a geopolitical strategic foreign policy pursued by the United States. It is loosely related to the term cordon sanitaire which was later used to describe the geopolitical containment of the Soviet Union in the 1940s. The strategy of "containment" is best known as a Cold War foreign policy of the United States and its allies to prevent the spread of communism after the end of World War II.
Because people didnt know who to trust and also they wanted to blame people for starting WW1 and as Hitler decided to be injust to the jews, other people folloeed Hitler's decisions.
After increasing for many decades, there has been a trend of decreasing voter turnout in most established democracies since the 1980s. In general, low turnout is attributed to disillusionment, indifference, or a sense of futility (the perception that one's vote won't make any difference).