Question

how was the immigration act of 1924 a means of fulfilling the desire of some americans to stop the spread of undesirables, and why did they want them stopped?

Explanation:

The Immigration Act of 1924 (Johnson - Reed Act) restricted immigration through quotas (2% of each nationality's 1890 US population, favoring Northern/Western Europeans). "Undesirables" were seen as non - Northern/Western European immigrants (e.g., Southern/Eastern Europeans, Asians). Reasons for wanting them stopped included nativist fears (preserve Anglo - Saxon culture), economic concerns (job competition, fear of labor unrest), and eugenics - influenced ideas (perceived lower "racial quality" of new immigrants). The act fulfilled the desire by limiting entry of these groups.

Answer:

The Immigration Act of 1924 (Johnson - Reed Act) fulfilled the desire to stop "undesirables" by establishing national origin quotas (2% of 1890 population, favoring Northern/Western Europeans) to restrict non - favored groups (e.g., Southern/Eastern Europeans, Asians). Americans wanted them stopped due to nativism (preserve Anglo - Saxon culture), economic fears (job competition), and eugenics - based beliefs about "inferior" races.