The Tet offensive proved that not only did the Viet Cong have the desire to fight back, but also the ability. It killed many US soldiers and set the war strategies back a bit. This added deeper conflict and dread to American fighters as well as American civilians.
Honestly, I think that the main idea of Harrison Bergeron is social equality as everyone in present day America wants to be equal with everyone else and in Harrison Bergeron, no one can be unique. I can’t think of anything for the second part.
It depends on the context and severity. For instance, if two people were in an argument and one of them calls the other a disrespectful name, you might separate the people and take away a privilege of the one who insulted the other
Understand you own personality can improve your relationship by knowing what sort of person you are and how you will react in certain situations or with certain people.
An example will be like:
I tend to be negative around people and have negative opinions.
You're a innocent, happy, bubbly person that has no worries.
Know that I'm that kind of person, while talking to you I'll avoid being negative so I wouldn't hurt you or offend you in anyway and we'll remain a good relationship.