I’m not sure that Le Pen’s supporters particularly care about Sarkozy being of Hungarian or Jewish heritage.
France soaked up a heck of a lot of people from Italy, Spain, Russia, Eastern Europe who consider themselves thoroughly French. France did not mind that type of immigration as they have long been trying to build up their population.
What they don’t like is people who live in ghettos, and they are not keen on large numbers of people coming in from North and Sub Saharan Africa.
There was a discussion between Le Pen and a guy of Moroccan descent who on the surface had gone through a rough time. He had gone to France as a kid, gone to Sweden to do (IIRC) an MBA and gone to the UK to work - he is one of the people the media drag up as a paradigm example.
At the end of the conversation Le Pen asked him ‘Are you French or a Foreigner’, there was a long pause, then the guy replied ‘French’.
The killer was that the guy had dual nationality, he held a French and a Moroccan passport, which Le Pen obviously knew. He was trying to point out that the guy was not unreservedly French. I heard this on the BBC, I think they considered that it encapsulated Le Pen’s position. Around the same time they said that French villages were scouring towns and cities for families with a load of children - as below a certain number of pupils, the local school would close, and it seems that is about the worst thing for any local administrator.
The ‘abstention’ stuff looks as if, by distancing himself from Sarkozy, then Bayrou’s supporters might not unreservedly support Royal.