Andrew Coyne: Canada’s openness a product of our history, geography more than a particular Liberal …

Addressing the UN General Assembly on Tuesday, Justin Trudeau is expected to preach the gospel of openness — to trade, to immigration, to each other — in the face of the swell of right-wing nationalism now coursing across the developed world: a mix of protectionism, nativism, and hell-for-nothing populism roiling politics everywhere, from Donald Trump to Brexit and beyond.It has been widely observed that Canada, almost uniquely, has remained largely untouched by this phenomenon. Could any prime minister resist the urge to sermonize a little, as if this reflected some special virtue of Canadians or, dare I say it, their current leadership?Does it? Goodness knows Canadians need few excuses to congratulate ourselves, not least for our modesty. But so far as we have remained immune to the temptation to put up walls against the outside world, it may have less to do with any particular Canadian – or Liberal — devotion to …