Thai Demeanour
Thais place great emphasis and value on outward forms of courtesy such as politeness, respect, genial demeanour and self-control in order to maintain harmonious relations. 
Many of their rules of etiquette are by-products of the Buddhist religion. 
It is a non-confrontational society, in which public dispute or criticism is to be avoided at all costs. 
To be openly angry with someone might attract the wrath of the spirits, which in turn could cause violence and tragedy. 
Openly criticizing a person is a form of violence as it hurts the person and is viewed as a conscious attempt to offend the person being rebuked
Loss of face is a disgrace to a Thai so they try to avoid confrontations and look for compromises in difficult situations. 
If two parties disagree, one will need to have an outlet to retreat without losing face.