Why were Chinese immigrants no longer excepted in California after the Civil War

With economic competition came dislike and even racial suspicion and hatred. Such feelings were accompanied by anti-Chinese riots and pressure, especially in California, for the exclusion of Chinese immigrants from the United States. The result of this pressure was the Chinese Exclusion Act, passed by Congress in 1882.

Explanation:

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the crusaders are identified in the painting;

c. by the red crosses on their backs