Question

why were negative ethnic stereotypes so difficult for immigrant groups to eliminate during the early twentieth century? these stereotypes were seen as linked to environmental factors that could only be changed with great difficulty. immigrants started to believe in these stereotypes and act according to them. native - born white americans mounted reform campaigns to change these traits in immigrants. these stereotypes were seen as being inherited biological traits and thus unchangeable.

Explanation:

In the early 20th - century, eugenics and biological - determinist ideas were prevalent. Negative ethnic stereotypes were often thought of as inherent, inherited biological traits, which made them seem unchangeable. This belief system made it extremely difficult for immigrant groups to eliminate these stereotypes.

Answer:

The stereotypes were seen as being inherited biological traits and thus unchangeable.