Hey Ducatisto,
Just use a trigger that has the condition Resistance present, in the location where the civvy goes to to meet the Res guys.
Civvy goes to rv, Res arrive, trigger true, civ7 globalchat "The russians ****"
OR
Just swap it for a Civillian present trigger for the reverse effect...
Res at rv, civvy arrives, trigger true, civ7 globalchat "The russians ****"
Is that what you want, or something more tricky..? Am I missing something..?