I have only seen the movies once each but I have a vague memory of it being part of the plot in The Last Jedi. Am I remembering wrong?
I don’t remember the movies that way, but more just about politics and what makes a democracy and what doesn’t, with a background of space wizards fighting each other, and regular people just trying to make their way through all the BS or fighting back against oppression.
War profiteers were selling to both sides was the plot point. Anything else is subtext and open to interpretation.
It’s vaguely referenced in The Last Jedi, but it doesn’t really go anywhere. Finn discovers the dude they stole the ship from was selling military hardware to both sides, and that’s basically all it ever comes up.
It is more of a big theme in the prequels, where you have the constant undercurrent of Palpatine orchestrating the conflict and driving the war machine for both sides. It comes up a lot in the Clone Wars show. But even then it’s not really about both sides driving perpetual war so much as how he used civil unrest to justify a proxy war to solidify his own power.
bOtH sIdEs