A teacher was killed in a knife attack in Arras, and the investigation was handed to the anti-terrorism prosecutor's office.
'The security of Israel is Germany's reason of state and we will act accordingly,' he said.
Police clashed with protesters in the northern city of Lille and in Toulouse in the southwest, and there was also unrest in Amiens, Dijon and the Essonne administrative department.
The Kremlin compared Macron to his predecessor, Napoleon Bonaparte.
If the reform were adopted as it stands, France would be forced to conclude that Israel has broken away from a common understanding of democracy.