A resistance group can still be terrorists. Terrorists are just people who commit acts of terrorism to accomplish a goal. Sometimes a group may commit them purely as a bargaining chip - "Stop attacking us and our people, or we'll commit more terroristic acts in response"
It's just embedded in public preception that terrorists won't ever stop doing it until they are stopped due to terrorists being an easy group to make villains in media as terroristic actions are horrific by design
So what you're saying is that I should convince the British I'm an artifact to get a free vacation?