I grant you that a choice between a neo-liberal and a fascist is extremely unpleasant. For ordinary people to vote to dismantle the protections against rampant capitalism for which their ancestors struggled, is pretty horrible.
But even that is not quite as horrible as becoming a Nazi. And if you are from an ethnic minority you have to resist or become a victim.
In France there is not actually a choice for anybody with the remotest claim to human decency. Do not sit on your hands while down the street they pull on their jackboots. Get out and vote for Macron. It is a duty to humanity.