I think there is a ground swell, started with Bretix, that is sweeping Europe and the US with people dissatisfied with being dictated to by the Liberal elite establishment. An establishment that steamrollers their ideal onto people.
People are seeing that they are unable to have a proper voice in determining what happens and why in their own nation states.
So yes, Bretix and Trumps win will allow La Pen get at minimum a foothold in the door and the same may well happen in other countries. They may not win outright but the amount of people that will vote for them will give everyone a wake up call.
NF manage to get only one MP in parliament but he influenced British politics more than anyone.