I have a "Han Shot First" shirt complete with a picture of Han's blaster. I've had more comments on that shirt in the year I've owned it, than from any other thing I've worn in public. Most are fully supportive (around my age, or even younger fans who've seen the original un-messed-with movies). Some ask what it means, and I explain it to them. Then they ask where they can find the un-messed-with originals (like an old fart like me can find them easier than the smart-phone generation). It's who Han is/was. Having Greedo shoot first simply ruins Han's character. Plus the CGI on that re-do is so bad, it's laughable.
Yeah, I was thinking that’s a shirt I should have my wife get me for Christmas. I just watched the scene again and it was clearly self defense even if he did shoot first. Greedo made it abundantly clear that he intended to kill him and was even looking forward to it for a long time. The whole cantina scene was pretty brilliant and Lucas is a D bag for messing with it.
Since Star Wars lifted elements from other films (samurai films that served the inspiration for spaghetti westerns, plus cliff hanger adventure serials), it is perfectly in-line with the spaghetti western genre for the stranger/hero to shoot someone in a cantina and to pull the trigger first.