From Guillotine to Machine Guns

Certainly what happened in Paris last week was terrible and dreadful.

I passed by the French military attaché's office in Oslo last week. The revolutionary flag and the EU flag were flying on half staff.

Speaking of the French Revolution, it's flag flies on half staff when lethal force has been used against unallowable opinion?

Guillotine or machine guns? Quelle est la différence?