Economic insecurity is widespread in Europe and the US. The right exploits this and uses cultural insecurity to blame economic problems on THEM (Mexicans, Chinese, Muslims, immigrants, the EU, etc.)

In Europe they hate the EU, refugees, immigrants and anything that infringes on sovereignty and the rights and privileges of 'real', native-born French, Swedes, Dutch, etc. (Monoculturalism is prized by the right in both the US and Europe.) In the US cultural insecurity is the right's fear of the increasing number and power of minorities, immigrants and secular or non-traditional groups.

Of course, LW populists recognize widespread economic insecurity. We differ in that we tend to blame our own 1% rather than the foreign version of THEM the right worries about.

There is not much 'there' there with Trump, but the same is true of Le Pen and a host of other RW populists who have been gaining in popularity. Their proposed solutions won't work - because their THEM is not the real problem - but every country has folks who are different in some way for the problems. Trump and Le Pen may espouse flawed policies but they know how to make a speech and simplify a complex world.