Here in Australia we follow something similar
Australia had the "White Australia" policy from the time of Federation in the 1900s until the late 1960s (although some of the provisions were relaxed in the two decades leading up to its abolition).
http://en.wikipedia.org/wiki/White_Australia_policyAs the government started easing the provisions of the White Australia policy:
(a) In the 1940s and 1950s you had the Greeks, Italians and Eastern Europeans come into the country. There was a lot of resentment that they were being allowed into the country and demands that they adapt to the Australian lifestyle
(b) By the 1970s the Greeks, Italians and Eastern Europeans had become a largely accepted bloc in Australian society. But, as the White Australia policy officially died, there were a substantial amount of immigrants from Asia coming into Australia. The criteria of resentment began to change. Now the argument went that the Greeks, Italians and Eastern Europeans had adopted so well into our culture so why couldn't the Asians do the same? This was still going on when our family came over here from Asia
(c) By the late 1990s the Asian community was an accepted bloc in Australian society. But there was an increasing influx of refugees from Africa and the Middle East. Now on talkback radio I hear people complaining that the Middle Eastern and African immigrants aren't able to fit into Australian society and comparing them unfavorably with the European immigrants AND the Asian immigrants. For those immigrants who remember the same language being used against them in earlier decades and who now find themselves being an accepted part of society, it is really bizarre to see how the cycle unfolds