Re: "I doubt French voters will blame her any more than American voters blamed Trump"
Plenty of French voters will criticise her, same as plenty of US voters criticise Trump. My own opinion is that Russia has tried to influence the elections, not so much to get 'their guy' in but just to bugger up the countries by fomenting as much argument and recrimination as possible, and just possibly get a less competent politician in a position of power.
It is less effective than shutting down the infrastructure but arguably not an act of war. The problem is Russia, but I agree, it is not that big a problem.