GRAND ISLAND, Neb. — Like many workers at the meatpacking plant here, Raul A. Garcia, a Mexican-American, has watched with some discomfort as hundreds of Somali immigrants have moved to town in the past couple of years, many of them to fill jobs once held by Latino workers taken away in immigration raids.

Mr. Garcia has been particularly troubled by the Somalis’ demand that they be allowed special breaks for prayers that are obligatory for devout Muslims. The breaks, he said, would inconvenience everyone else.

“The Latino is very humble,â€