Is it a faux pas to p Naan bread to a Muslim with the left hand?

This sounds like a bit much. It sounds like your neighbor is under a lot of stress. I am Muslim and we have certain etiquette that we follow. It is not permissible to eat with your left hand. The Prophet Muhammad (PBUH) forbade it because we clean our selves with our left hand after using the restroom. This is not how Muslims respond to people that don't know about our etiquettes. We don't respond to one another like that either. However,it seems like there is more to this story. It is not adding up...unless you live in a really abnormal place