The Most Important Video You Will Ever See - Bullying

What would have been the right thing to do in the situation described in the video?

1) Immediately leave the lecture theatre in support of the exiled student?
2) Have a private word with the lecturer afterwards so as not to cause him loss of face by immediately walking out?
3) Find out more about the situation and talk to your fellow students afterwards?

Do you think we as a collective reacted well to the events of 2020 and 2021?