Europe is NOT dealing well with multiculturalism and immigration. And while the American/Canadian progressive left goes more radical, at least it keeps the extreme right wing in check. The European left is too scared and complacent to either set boundaries or speak up for the benefits of liberalism due to complacency after decades of being in charge. As a result, the conservative/nationalist/fascist wings are DOMINATING the conversation, and are winning hearts and minds.
And yeah, I'm fully expecting at least one Eastern European country to start openly locking up muslims within a decade.
I don't think that's the full picture. First of all I don't think the European left has been in charge for decades, and second of all austerity measures e.g. in Spain have resulted in left movements growing stronger.
It all depends on the country, really.
Meanwhile, wages are being cut, they are being bled dry paying for healthcare they can't afford, new entrants have tens of thousands of student debt they cannot pay off, they realize their voting in new people, either republican or democrat gets them the same old shit (see: Sanders and Trump, the outsiders).
I am optimistic for the next stage in US development, but I also think you are correct that people are angry, but don't know which direction to force it. Fascism is just as likely (if not more likely) than a socialist revolution if people uphold strong nationalism, protectionism, and direct their anger at some marginalized social group (formerly Jews, now Immigrants).