Explanation
In Vietnam, pointing with your index finger is considered rude and accusatory, especially when directed at a person. It is associated with negative gestures and can be seen as disrespectful. Instead, use your whole hand with palm facing up to gesture toward someone or something.
Local Tip
When indicating a person or object, gesture with your open hand, palm upward, or use a slight nod of the head.
How it compares elsewhere
Pointing with the index finger is considered impolite; use an open hand instead.
Pointing with the index finger is generally acceptable in casual contexts.
Pointing with the index finger is offensive; use the thumb or an open hand.