I think it is a two part thing: 1) Fuel prices increased and people riot. 2) The reason for the increase was to be able to give the money away as part of the "Paris Accord" no  doubt. We all knew about 1) but were not sure of the reason and now President Trump has given us a reason.  So you can see why the French might be upset and POTUS also helps to expose the real "Climate Agenda".