Failings of the economic and political sstem obviously generates anger and resentment, as an alternative to despair, or alongside it. Call that populism, but it can be channeled in very different ways.

There's a big difference between Spain's Podemos and France's Front National, or the nationalism of Nicola Sturgeon and Nigel Farage.

Trump's populism is in the tradition of the rightwing populists in Europe in the 30s, or the American Know Nothing movement.