The Stormtroopers are uncaring, merciless dudes, for sure. But - WHY DO THAT?! Even if Owen and Beru were holding out on information, murdering them and BURNING THEIR CORPSES OUT IN THE OPEN is an incredibly weird, malicious choice to make. Hell, even Vader - the baddest dude in the universe - never resorts to defiling corpses for no reason. They don't even bury them - just leave them on the front porch for anyone walking by to find. Real, REAL messed up.
Watch Star Wars again. After Aunt Beru and Uncle Owen are found dead (and their corpses DEFILED), Luke NEVER MENTIONS THEM AGAIN. You can pretty much read Luke's reaction to this all as a happy one - he's finally free to explore the galaxy, join the Rebellion, and do whatever he wants! His stupid, boring aunt and uncle are gone forever and out of his way! Yay!
Seriously - he never once indicates he's trying to get vengeance for them, honor their spirit, or make them proud. He never mentions them by name or even in passing. He's just psyched to not have to drink blue milk and "farm for moisture", whatever the hell that means. And - while this cannot be confirmed - they were probably murdered and their farm destroyed because they refused to give up the location of the droids (and therefore Luke). They probably died to protect their whiny nephew, who was forced onto them by some weird space wizard 20 years ago.
Hey, speaking of people dying and then main characters not really giving a shit - Alderaan. It's a pretty big moment in the film, when you see the kind of firepower the Empire is packing once and for all, but it doesn't have a whole lot of weight to it - at least, not the weight it should have. I mean - AN ENTIRE PLANET GOT BLOWN UP. In, like, a second - an entire civilization was completely wiped out. And our only connection to it is Leia, who grew up there and (presumably) had her entire adopted family die before her eyes.
The weight of that is completely left to Obi-Wan's line about millions of voicing screaming out in terror and then suddenly being silenced, and then it's mostly passed. We don't get any real reaction out of Leia - hell, the next time we see her, she's mostly just sassing Luke (in his Stormtrooper get-up) like nothing's wrong. She's got more immediate problems, sure, but it'd be nice if someone would recognize the MULTI-MILLION PERSON GENOCIDE THAT JUST HAPPENED.
When Obi-Wan enacts his brilliant plan to get murdered by Darth Vader so that he can become an advice-giving ghost, the only remains he leaves behind are his robes. And maybe his underpants, which would have to be super-gross and smelly, since water was extremely scarce on Tatooine, especially for hermits living in huts in the middle of nowhere, so the odds of them being regularly washed are slim to nil.
Or, more terrifyingly, OBI-WAN WASN'T WEARING ANY UNDERPANTS AT ALL.
Remember the floating torture-orb robot that Vader brings into Leia's cell? It's got a syringe and a bunch of weird instruments that are either for mixing cake batter or REALLY fucking up a human being. Odds are it tortured the shit out of Leia - yet nothing is ever heard or seen of it again. Leia doesn't mention it AND she has no visible signs of being brutalized by anything or anyone - heck, her HAIR isn't even out of place. So what the hell happened with that bot? Did it just fuck her up in areas that were covered in clothing (which, granted, is MOST of her)?
SOMETHING had to have happened with that torture droid - maybe it even did hurt her badly, but whatever was in the syringe made her forget and hence not have any thoughts about it later? According to Wookieepedia, it did her no actual physical harm (although there's no way to know this from the canonical films), yet caused her "unbearable pain."
Oh yeah, also it was Darth Vader who tortured his daughter a bunch. I guess he technically didn't know it was his daughter, but COME ON - he SHOULD have noticed she was Force-sensitive and had some inkling that maybe not to go nuts on her with a torture-bot. Really, don't use torture-bots on anyone. Dude, you can choke people with MAGIC - isn't that a little more threatening and reasonable than using a robot with a pain-needle?
Dude we know you can choke people without having to even touch them. Why not do that always? You have MAGIC POWERS, USE THEM.
So fucked up.