USA:

During 1999-2002, an annual average of 41,100 intentionally set highway vehicle fires caused 11% of the highway civilian vehicle fire deaths and 5% of the civilian fire injuries per year.

Yes, accounting for a five times bigger population, in France this would 'only' mean 8,220 incidents per year, a fourth of what was in France this year so far - but this is only the highways.

For the UK, 2001 figures:

The 102,100 vehicle fire total was the highest seen in the decade. Eighty-eight percent of these vehicles were cars. Seventynine percent (70,100) of the car fires were "malicious."

Now THAT are 'riots'!

_{*Lunatic*, n.
One whose delusions are out of fashion.}