system
Given the following post, respond as if you're commenting on Reddit:
human
[Kung Fu Panda] How well known was the Panda Massacre?

When Shen slaughtered the pandas to the point he believed them extinct, how well did the rest of China know about it? For example, if word got out to mainstream China, why didn't Oogway, or any kung fu masters or soldiers step in to protect the pandas? Also, when Tai Lung first met Po in the flesh, he of course underestimated him but didn't seem that shocked to see a living, breathing panda, but then again he was in prison for 20 years. So was the Panda Massacre common knowledge, and if so, why did no capable warrior try to put a stop to it while it happened?
gpt
It's implied that it happened very quickly, possibly all in a single night. No one knew that a massacre was coming. Even if oogway did know,  he's not one to meddle with fate, and left it up to destiny the same way he did with Tai lung. 

The fact shen's parents were shocked implied he went on his own(telling no one what he was doing), took a group of wolves to destroy the panda village, and sealed his own fate. If it was all done in a single night, that would explain why no one knew what was happening until it was over. 

If Shen was then exiled immediately after, it would make sense only he was surprised that there are still pandas. 

Tigris seems outright disgusted by Po the first time they met, and she's the only one to make a point of how fat he is. She is roughly the same age as Po, it's possible she'd never seen a panda before, since she didn't realize all pandas are like that. Oogway, Shifu,  and Tai lung were all older than her and unfazed by Po's existence. 

Presumably it took place roughly 20-30 years ago, since Po was still a baby.