When my family came to Canada, we chose Canada specifically.  We went through a formal system.  Except in the case of serious natural disasters, I think it is important to trust and use the system.  The world is, unfortunately, full of economic and political instability.  We don't diminish the cause of diversity by having a reasonable and balanced approach.  It's important to also recognize that we have persistent domestic needs competing for resources.  Having been in Canada about 50 years now, I personally would be intrigued to have indigenous representatives participating in immigration policies.  A nation can't be defined by exceptions and special treatment.  But in those situations where others would like exceptions made, I think we should seek guidance from those who have sacrificed the most.