I assume Americans blame Russians for the collapse, and Russians blame Americans, but who do Europeans see as responsible? Is it mostly one of them? Both? Themselves a bit?
There's a lot of miss information at play. Remember that the blackout has caused significant communication and information loss.
As for Europe, a lot of the countries here are spending their efforts just trying to survive. Germany has fallen for example, but then you'll have the likes of Falck who is No Pat of German origin. She will fight for both US and RU as a means to an end.
War is very rarely clean cut.