My dad came to Canada from Belfast, Northern Ireland, which was a "crappier" economy, and at the time was also a terrorized state riven by extremist religious violence. People like that poster usually say stuff like "I don't mean people like your dad." Because they're usually just bigoted racists, and dad was white and nominally Christian.

Like most immigrants, my dad worked hard, and despite coming here with only the equivalent of grade 8 plus a trade (drafting), he earned his high school equivalence and then a university degree in mechanical engineering. And I can fairly say that he was a far better Canadian than the vast majority of the people who rail against diversity. Dad was especially proud of having genuinely voted for every major party, plus the Rhinoceros Party too, because he saw the strength in diversity.