@Jhkim:
The reason the thread was obliterated was because it veered into political discussion and there were increasing cases of posters sniping at each other. While the posters involved were familiar with each other and their style and probably took nothing too personally, their posts were reported - likely tagged with the 'p' word - and the mods took action. It had absolutely nothing to do with any content beyond that which violated the CoC. 'Non-white heroes' are a-ok to discuss and the implication that this could have been the reason that the thread was annihilated is somewhat disturbing (that that possibility was even a consideration) and also wholly inaccurate.
That said, this thread is also a CoC violation. Without express permission, it is against the CoC to open a thread that uses the same title and discusses the same topic as a thread that was locked/deleted. The second version of Women and Minorities was opened legally after a member lobbied successfully for a second chance. That chance was blown and I am not aware of any third opportunity given (if someone else is, please make it known). I'm sure you've already seen why this is the standard practice. People carry the fight to the new thread. It's an unfortunate policy that anything that proves to push too many members' buttons is pretty much a forbidden topic, but them's the breaks.
I thought your OP (barring the odd accusation) to be different enough, IMO, to be ok. The thing is, you used the same title and therefore put a target on the sucker. There's plenty of interesting stuff to discuss and some good did come from the previous incarnations. The topic, though, may simply be something that some members are incapable of discussing rationally and that means it's doomed to be crushed under the polished boots of our overlor ... moderators.
In other words, do not be surprised to see this thread disappear. It's a CoC violation in and of itself that will likely invite many more. And please try not to read anything beyond that if it does, indeed, vanish. It's simply unfair and could give the wrong impression of how things work to people less familiar with the site than others. Oh, and it's slightly offensive, too.