It's complicated but short answer yes. I feel it's more of enemy of my enemy thing than an actual support. However from what I recall, Marine Le Pen has never been racist, it was her dad that was. She's most likely xenophobic to some point but she more polished than her dad and that's why she managed to go to back to back runoffs.@Liu Kang, you raised an interesting point regarding the islands, so Martinique and Guadeloupe are willing to disregard the clearly racist nature of Le Pen over immigration?
I talked about it several years ago but the anti-Haitian sentiment in the Carribeans is very real. That is all coming from Haiti being the poorest country in the area obviously but Dominicans aren't far off either to be honest. Guadeloupeans and Martinicans being part of France, they get a European level of standard of living which plenty in the area want to benefit from. Same in Guyane, La Réunion etc.
Xenophobia exists everywhere and you could look at TLR and "tethers" or some similar Tariq Nasheed rethoric for a closer example.