People in the U.S. perceive that we are "swarmed" with immigration, but actually http://www.hispanic5.com/foreign_bor...ecord_high.htm our foreign-born population is only 20% of the population, as opposed to 35% back in 1910.

Regarding Sweden, its foreign-born population is 12%, half of Australia's foreign-born percentage and behind Canada, the U.S., New Zealand, Germany, Austria, Switzerland and Luxembourg. I think they'll survive.