Having said so much about the war between France on one hand, and various terrorist groups of Africa on the other, groups that were supported among others by Iran, Sudan and Hezbollah, I have to say that the terrorist attacks in France had nothing to do with Iran and Hezbollah.
These attacks were orchestrated by the Islamic State. The Islamic State are the ex-people of Saddam Hussein in Iraq, who were overturned by the Americans in 2003, in order for the Americans to bring to power the Shia Arab majority and the Kurds of Iraq.
The oil and natural gas of Iraq is located in the Shia and Kurdish parts of the country, and the Sunnis are fighting the Shia and the Kurds, and France is very active in the oil fields and gas fields of Iraq, and France is fighting ISIS.
France was very active in Iraq even at the time of Saddam Hussein. Saddam Hussein was paying bribes to the French politicians in order to stop the Americans and remove the sanctions against Iraq. See the Guardian “France's Saddam deals revealed”, October 2004.
Therefore France is bombing ISIS, and ISIS supports terrorist attacks in France. See for example the Mirror “Paris terror attacks: ISIS bombed by France in new revenge airstrikes after president declares 'we are at war”, November 2015.
Also see Reuters “France to send heavy weapons to Iraq – Hollande”, July 2016, and CNN “French jets bomb ISIS stronghold of Raqqa, Syria; few may have been killed”, November 2015.
And when I say that Iran or Sudan were supporting terrorist groups against France in Africa it does not mean that they own these groups. The people of these groups are criminals who can be hired by someone else. Now that Iran has improved its relations with France somebody else might support these criminals.
As far as Iran and France are concerned, it remains to be seen how they will manage to sort out their differences in Syria, and whether the French will support the Trans-Saharan pipeline, which is good for France but very bad for Iran, Qatar, Russia and Turkey.
Map Possible Pipelines to Europe
Moreover we must keep in mind that the relations between France and Iran are better, but Turkey is still an enemy of France, and Turkey was the country that was buying the oil of ISIS and was providing ISIS with intelligence.
That does not mean that Turkey supported the ISIS attacks in France. But when you support a terrorist group you cannot completely control how this group is going to use its newly acquired expertise. And remember that the Turks are accusing the Europeans and the Americans for supporting the Syrian Kurds, and sometimes this support ends up in terrorist attacks against Turkey through the PKK. See “Erdogan and ISIS”.
https://iakal.wordpress.com/2016/03/28/erdogan-and-isis/