There is also a sliding scale in EU. Western European countries like Germany, France, Sweden, Netherlands, take in far more immigrants than Poland, Hungary etc. The point that triggered this whole thread was immigration is the reason America doesn't have the same quality of life as EU. Which is clearly not true, considering Germany and NL takes in very high % of immigrants. Even with your 13 vs 10% is negligible for any meaningful policy differences. US is different not because of immigration, but due to its political bent.