Luthen is supposed to be problematic. We know it. The Rebellion knows it. And Luthen knows it. Blowing up assets is how you conduct a guerilla war. Any Imperial asset is a valid target. Any Imperial official is a valid target. They don't need to be actively committing atrocities. I doubt the French Resistance passed on the opportunity to damage the Nazi occupiers because they were just passing through town.It was good but Luthen's character is problematic, especially that scene where he and kid Kleya blow up a patrol on Naboo that near as we can tell wasn't committing any atrocities at that time. Cassian then claims that the rebellion wouldn't exist without Luthen and his methods, i.e. terrorism is needed for protest which is a dangerous claim to make.
Strangely enough before Andor the Alliance was shown as different from Saw's Partisans as engaging when necessary but trying to avoid anything gratuitous (like setting up Ghorman which Luthen had a role indirectly). Andor made Saw into a drug addicted nutjob, replaced him with Luthen and basically undid the whole original argument between Saw and Mothma by replacing Saw with Luthen and then giving Luthen a sympathetic angle.
Saw was a nutjob in Rogue One. Nothing new there.