Explanation
In Germany, pointing with the index finger at a person is considered rude and aggressive, as it is associated with accusing or scolding. It is more acceptable to point at objects or directions, but even then, using an open hand or a nod is preferred in polite company.
Local Tip
When indicating a person, gesture with your whole hand (palm up or sideways) or use a subtle chin lift instead of your index finger.
How it compares elsewhere
Pointing with the index finger is very rude; use an open hand or a slight bow to indicate.
Pointing with the index finger is common and generally acceptable, though not at people in formal settings.
Pointing with the index finger is considered offensive; use the thumb or an open hand instead.