That's been my biggest gripe with just about every Gundam series since the original - the continual humanization of genocidal, dictatorial regime who precipitated the OYW, were the ones that caused the first colony drop during Operation British, and were also the ones behind the second colony drop during Operation Stardust.Of course I'll watch the series because it looks really interesting, but I'm a little annoyed by the tendency to make Zion seem like the Federation's equivalent if not the "good guys".
They killed THREE BILLION people in a few days. Their favorite sport was gassing the colonies and using them for target practice against Earth. Their leader openly used Nazi-style rhetoric.
But in the latest series they always appear ethically and morally not dissimilar from their enemies. OK, the Federation didn't want to give Zion independence. But I don't see that as a good justification for their atrocities. At least in the original series they were clearly the "bad guys", albeit with various nuances.
How anyone can look at Zeon's actions and still wonder "gee, I just don't know if they're the baddies" frustrates the living hell out of me.