Anti-immigrant claptrap

When we lived in BC 20 years ago, we used to hear a certain amount of anti-immigrant claptrap -- from people whose great-grandparents were, of course, immigrants but who now considered themselves "Canadians" and who now deeply resented all those new people, usually brown-skinned of course, who had the effrontery to use Canadian social services from time to time.
With all the marches going on in the United States now, I'm hearing more anti-immigrant claptrap again in the blogosphere.
So here is an interesting post -- More Stupidity in my In-box -- which rebuts very effectively some of the most ridiculous clap-trap stuff -- worth reading because it applies to Canadian attitudes too.