Not all jamming is created equal. What the Fencers were doing was spoofing, that is jamming active acquisition radar. That is defensive passive jamming.
Jamming enemy communications or systems like GPS are offensive active jamming. That is an act of war.
If it fails. If it succeeds then the war doesn't start and no victims appear. If a wquad of superultraspecial marines is blocked and forced to surrender under the circumstances of absence of the communication, then acr of war doesn't happen from their side and it turns into act of propaganda. If Russia destroys GPS sattelites then it is a possibility of the war.
But these are details which we can neglect. The balancing of modern political situation at a knife blade between cold war and nuclear war is more then obvious even from the discussion of these details itself.