Caste in Nepal (and India) Can be Triggering. What And How? Depends
Nepali society suffers greatly from the legacies of our long casteist history. One of the legacies is that caste can be triggering. What it triggers and how depends on the individual and more importantly on their caste. However, the abysmally poor quality of education system and poor level of education of the population of Nepal means that most don't know much about that, and worse react inappropriately when those who are triggered speak up.
BUT those who don't know, can learn about all that from those small numbers who are speaking up. All that is required of them is to listen! That's it.