I want to start by saying I'm not sure Air France should be subsidized to the level we do. Its workers rules from the 80s are just not adapted anymore and protecting them with public money against normal competition is stupid. And I don't mean when compared to oil-funded middle east airlines (which are eating everyone's lunch in europe on an unfair basis), but compared with others EU airlines. KLM is being abused to pay for Air France's bills, for exemple, that's just wrong. They tried to push into low cost workers stopped it, they tried to keep competitive with high cost workers complained, it's stupid and weird. It has giant potential but we're ruining it.
With that said, Russia trying to punch our national carrier down means they guarantee we won't let Air France hurt too much. Why would Russia try to play the economic game against a country so much richer than it is a question I can't answer. Probably because we don't depend on their oil nor gaz and since that's virtually the only thing they do they don't have any thing else than their giant airspace to get back at us ...
All of that to say: Air France stock holders are probably happy at that news.