By Alasdair Sandford
BBC News, Paris
Political opponents of French socialist presidential candidate, Segolene Royal, have accused her of making serious errors during a Middle East trip.
This is Ms Royal's first visit to the Mid-East as presidential candidate
Opponents from the ruling centre-right party have criticised her stance towards Hezbollah.
This was her first official overseas trip since winning her party's nomination for the election last month.
On Monday she was in Israel, meeting Prime Minister Ehud Olmert and earlier Palestinian leader Mahmoud Abbas.
Although she has been given a warm reception fit for a head-of-state in waiting, at home, her visit has become mired in pre-election controversy.
During a joint news conference in Beirut, a Hezbollah MP compared Israel's policy towards Lebanon with Nazism.
Ms Royal did not respond, saying later that her interpreter had not used the word - but had she heard it, she would have condemned it as abominable.
During the meeting she also said she shared many of the Hezbollah politician's critical views on the US.
Opponents from the governing UMP party and Jewish organisations say the socialist presidential candidate is guilty of a naive, irresponsible attitude to Middle Eastern affairs, damaging to France.
The French Foreign Minister Philippe Douste-Blazy described her attitude as simplistic.
Segolene Royal's campaign team pointed out there had been no reaction from Israel, saying the attacks from home smacked of electioneering.