> So any taxation is justified?
Yes. We have income tax in the US. It's the same thing.
Google doesn't have to pay the tax if they're not operating in the country. It says right there that if their revenues are +$25m a year, they are subject to the tax. Conversely, the US can also levy taxes against French digital services, and maybe they should.
My guess is the cost of not operating in France is much higher than the tax to do so, so that would be a silly maneuver.
Tangentially, I find it hilariously hypocritical that the Trump administration is whining about unfair tariffs on digital services.