Earlier quoted context omitted.
The helicopter in question was flying in Oman, in Omani territorial waters. Why does Iran have the right to fire drones into other countries?
Gee, I wonder why? Maybe because the Israel-US axis decided it was a good idea to start bombing them earlier this year? Could be that? Perhaps, and this is a long shot, they see military equipment close to their border as a threat? People get weird like that when countries start bombing their schoolgirls into minced meat.
This entire conflict was fully avoidable if Iran never pursued nuclear weapons.
Why can't Iran just be a normal country, and not pursue nuclear weapons?