3. Which of the following reasons helps explain why relations between people already living in America and immigrants soured after the War of 1812? Catholics feared that Protestant immigrants would threaten Catholicism's place in American society. O People already living in America feared that if the country from which they emigrated lost too many people, the country would fail. Immigrants were responsible for riots such as the one that occurred on May 6, 1844, in Kensington, a suburb of Philadelphia. Immigrants were regarded as competition for jobs that were becoming scarce due to the increased use of machinery in factories.

3. Which of the following reasons helps explain why relations between people already living in America and immigrants soured after the War of 1812? Catholics feared that Protestant immigrants would threaten Catholicism's place in American society. O People already living in America feared that if the country from which they emigrated lost too many people, the country would fail. Immigrants were responsible for riots such as the one that occurred on May 6, 1844, in Kensington, a suburb of Philadelphia. Immigrants were regarded as competition for jobs that were becoming scarce due to the increased use of machinery in factories.