If you see someone being picked on in public, Do you intervene?

I almost got into a fight with a college kid that was showing off in front of his friends’ he was making rude comments to a guy that was overweight , the guy looked so sad , so I told the college kid to chill the fuck out , that he is being disrespectful, He told me to Go fuck myself , I then gave him a death stare and was going to drop his ass and went towards him to punch him , but his friends quickly grabbed him and pulled him back and walked away because they knew I would drop him. Why are people such assholes? , some people were laughing and some people were just standing there not saying a word. The guy thanked me for sticking up for him. I told him don’t sweat it , they are just dumb kids trying to act like they are hot shit. Do you intervene when you see someone being picked on and made fun of?
If you see someone being picked on in public, Do you intervene?
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