Macron is expected to push for local leaders bitterly divided by the issue of independence to resume talks, and to thank French security forces that have been seeking to restore order.
The main French Jewish umbrella group described the synagogue blaze as "a scandalous message" and "a way of saying that Jews don't belong in French society."
Massive manhunt under way in France for prison-break gang mercurynews.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from mercurynews.com Daily Mail and Mail on Sunday newspapers.
The Nordic Response 2024 exercises bringing together more than 20,000 soldiers with different languages, equipment, habits and histories are intended to foster the teamwork necessary for the alliance to function.
Farmers in neighboring Belgium also set up barricades to stop traffic reaching some main highways, including into the capital, Brussels. Most protests are happening in the French-speaking part of the country.