It certainly isn't like 2002, when there was a general oputpouring of revulsion and indeed shame that Le Pen snr had reached the run-off
Although Chirac was of course the bete noire of the left, he was suddenly seen as the saviour of France, and was in any case a tried and tested and (albeit by many) grudgingly accepted "normal" politician.
In 2017 LePen jnr has tried to shake off the stigma of racism that attaches to her, her family and her party, but it won't work to the extent of bringing her victory on Sunday. Macron suffers from being seen as neither a fresh break with the past, nor an experienced, safe pair of hands.
Temporarily stuffing her FN membership card in the bottom drawer is a pretty cynical move, and somewhat spoiled by the new leader being reminded of remarks he made about Zyklon B years ago.
Nonetheless it is likely that up to 40% of the people who bother to vote may plump for Le Pen, which is bad enough.