Darth Vader is leading an imperial army fighting terrorists. I guess some might find some similarities in the real world. Not to mention the politics remind me of something..
Indeed. Darth Vader stands for purity, civilization, order. He's a go-getter: he's got a job to do, he does it and doesn't let anything stand in his way. By contrast the rebellion is all about chaos. Indeed, if only the rebels would stop their vain attempt to overthrow the just and good Empire, then all could enjoy peace!