LePen supporters, like populists everywhere,  have a few defining characteristics. Usually, but  not always, they are poorly-educated people from rural areas who vote based more on emotions... fear and anger, mainly.. than for logical reasons. That is why they end up with leaders like Trump and the Republicans who legislate for the rich, while pretending to represent the middle and poor classes. See their Healthcare proposals as an example. 
Populists tend to completely disregard all facts, including scientific facts, that are contrary to their fixed and ignorant beliefs, getting emotional reinforcement from others like them. Blaming "the elites" for their problems sells well with that crowd. 
But the fact is,  globalization per se, is not responsible for most job losses in past decades nor will it be in the future.. Automation and technology are, and it will get much worse. LePen has no program  to address that, pretending instead that insular nationalism is the solution. It isn't.