Who is wrong?

Lately, this video is spreading like wildfire in Korea. I think the lady acted too violently. In Korea, usually when someone is fighting, Koreans usually will try to ignore it unless they think that you are intruding into their space, etc.

They mind their own businesses. It's good in one way. For example, when you accidentally left your umbrella in the restaurant, you can just return and get them later. Nobody will take it. So far.