Akwat Kbrana said:

Furthermore, the PT equivocates. For instance, murdering children in Ep. 2 is just fine and dandy because "to be angry is to be human." But then when the same guy does the exact same thing in Ep. 3, suddenly it's this revolting, horrible thing.

Or maybe I'm wrong; maybe it's only ok to murder children as long as they're tusken children. Y'know, since they look different than humans, and are kinda creepy. So...the moral message here is "racism is fun"?

The whole point there was that the killing of the Tusken children wasn't okay. That's one of his major first steps into the Dark Side, and it's not portrayed as being okay in the film. Padme says what she says, but the film certainly portrays the Tusken massacre as wrong.