The resurgence of fighting in led to new displacements, especially of Tamils from the north of the island. Charts asian immigration is the total number of immigrants who came to the United States from to ? The Act marked the beginning of a period of refugee immigration. The McCarran—Walter Act also introduced some labor qualifications for the first time, and allowed charts asian immigration government to bar the entry of or deport immigrants suspected of engaging in "subversive activities", such as membership in a Communist Party. See also.