I think the main difference though, Canary, would be that the "Far Left" would be calling for even more porous borders, even more assistance to be given to illegal migrants, some of whom are currently turning Calais into a war zone, and an ever increasing burden on the taxpayer who is ultimately paying for the entire mess.
"Far Right" groups tend to prefer the maintenance of law and order and to provide facilities for law abiding citizens to go about their business unfettered by criminals. They prefer to determine who does and does not enter the country and eject those who arrive illegally.
Ms Le Pen is absolutely correct in calling for a tightening of internal borders within the EU. Much of the problem in France has come about as a result of the ridiculous Schengen agreement which abolished those (already porous) borders. The French signed up to that agreement despite warnings that it would lead to exactly the sort of problems they are experiencing now. The cause of the situation in Calais is not the UK's generous benefits system (though that does not help). It has come about because migrants, particularly from Africa, can gain easy foothold into Europe, usually via Italy, and once there Europe is their oyster. Italy makes a great play of "being proud to welcome them" then quickly ushers them across the border into France.
It's an utter mess. I visit or pass through Calais four or five times a year and was there in July. However it is now a place I shall not be visiting in the foreseeable future. The effect the migrants have had upon the town is profound and whilst I rarely have sympathy for the French I do feel a little for the people of Calais who have seen their town (and much of their livelihood) destroyed. But that’s the benefits of the EU’s “freedom of movement” for you.