The problem Nico is that if Ukraine is allowed to prosper, without Russian interference, Russia will collapse.
Russia will do her best to interfere in Western Ukraine as well because economic success of that country is a death knell for the Russian Mir.
Also a sovereign Ukraine is almost an existential issue for post Communist states in Eastern/Central Europe.
France which has 1000 years of history and friendly links with that part of the world will come to understand this.
Lots of people intermarried. Lots of sympathies.
As long as America can be rallied with Eastern Europeans with the aid of the UK which wants Russia weaker, and France and Germany not as influential, the goal can be achieved.