Let's look at the facts. For most of American history, we admitted an average of approximately 250,000 immigrants a year. After the Immigration Reform Act of 1965 (Ted Kennedy's baby), however, this figure rose fourfold to approximately one million a year. The result: The rate of immigration started to exceed the rate of assimilation.
But it wasn't just the numbers that changed; it was also the nature. Eighty-five percent of our legal immigrants now hail from the third world and Asia, from non-Western cultures. And many immigrants, such as Islamists, cling to and advance beliefs that are incompatible with -- and destructive to -- our culture.
The problem with this is that it isn't geography that makes a nation, but people. Replace Americans with Mexicans or Muslims and you no longer have America -- you have Mexico North or Iran West. Thus, if you believe Western culture is an evil force and aim to destroy it, our current immigration scheme perfectly suits your agenda.
http://www.americanthinker.com/2010/07/immigration_reconsidered.html
Canada has been one tenth the size of the US for about the last 100 years. Their immigration quotas went up by a factor of 4, ours are going up by a factor of 6-7. We are already seeing the non-assimilation phenomenon in Canada despite the fact that they had a 25 year head start on us.
Immigration quotas that exceed our traditional 40-50,000 per year (of all kinds) are the seed that creates a future Yugoslavia in what used to be Canada. Quotas must be brought down or our Country will slowly, and perhaps violently, fade away.