The party as founded and directed by Ms LePen’s father was as you say anti-Semitic, etc. She supposedly purged that element from the party. However its France where your choice is usually what’s the least bad.
I think the cheering on this site is more for the anti-EU part of her campaign then anything else. Warts and all a win for her would probably be good for France in particular & Europe in general.
Sorry the truth is most everyone in France is anti-Semitic regardless of party this is canard issue.