“What is the matter with you? You are so fat! There are so many people yet you squeeze in to get on the subway,” the elderly man can be heard saying.

The young man apologised before angry fellow passengers joined in to support him against the elderly commuter.

“Why is your mouth so filthy? Does he deserve this? It’s not a big deal,” a woman said.

But the older man would not let the subject go.

“You are so fat! You go out of the line and stay at home for a while. Or get a taxi so that you will not affect others. It’s morning rush hour. Don’t you know better?”

More came to support the young man while he continued to apologise to the elderly man.

“It’s very crowded at this hour. Everybody should be tolerant of others,” said one.

“Drop it. He has apologised.”

The elderly man repeated “Stay at home. Your overweight has affected others” before cutting ahead in the crowd.

The video clip sparked overwhelming support for the young man from social media commentators, and condemnation for the older traveller.

“What is the matter with the elderly man? Why does he squeeze in the subway in morning rush hour? Isn’t it better for him to stay at home?” wrote one internet user.

“He doesn’t live on you and why do you care about him being fat or not? I don’t know why the elderly man feels so superior? He doesn’t deserve any respect,” wrote another.

“I wish the overweight man could see these comments and not be hurt by the elderly man. You have good manners,” wrote a third internet user.