What cultural faux pas should I try to avoid making in Chania?

"When visiting Chania, it's important to respect the local customs and traditions to avoid any cultural faux pas. Firstly, Greeks are known for their hospitality, so refusing an offer, especially food or drink, can be seen as rude. Try to at least sample what is offered to you. Secondly, avoid discussing sensitive topics such as politics and religion, as these can lead to heated debates. Greeks are passionate about their beliefs and it's best to steer clear of these topics unless you are well-informed and can handle a spirited discussion. Thirdly, Greeks are very proud of their culture and heritage, so any negative comments or jokes about Greece or its history can be seen as disrespectful. Also, when visiting churches or monasteries, dress modestly. Women should cover their shoulders and knees, and men should not wear shorts. In addition, it's considered rude to wave with an open palm, as this gesture is used as an insult in Greece. Instead, wave with your palm facing inward. Lastly, punctuality is not highly valued in Greece, so don't be surprised if people are late for appointments or social gatherings. However, as a visitor, it's best to be on time. Remember, the key to avoiding cultural faux pas is to be respectful and mindful of the local customs and traditions," mentioned another expat when asked about moving to Chania, Greece.