anger is known for being a very violent dangerous. the definition of anger is "a strong feeling of annoyance, displeasure, or hostility". now compare thar to nostalgia, the definition being "a sentimental longing or wistful affection for the past, typically for a period or place with happy personal associations". on a surface level you would think anger is more dangerous, but in reality nostalgia can cause way more harm. with nostalgia it could make you idealize something to a toxic extent, holding everything in your life to a pedestal that it will never achieve. keeping you stuck in the past to the point of never growing as a person is not only dangerous but can also not only hurt you but the ones around you for a long period of time, and that's another reason why nostalgia is more dangerous than anger. anger is fleeing, nostalgia stays for how ever the person is willing to hold on to the feeling.