Both the far right and far left throw around accusations of "ethnic cleansing." Both are ridiculous, but considering the U.S. population shifted from 85% white to 55% white in the last few decades, and even today most immigrants come from Mexico, India, China, etc., there really doesn't seem to be much evidence that we're actively trying to limit the flow of non-white people into America. Besides that, there are valid reasons why people want to limit or increase immigration that don't justify hysterical accusations of ethnic cleansing.