I didn't realise that traditional dances performing in a foreign country signifies that the country in which those dancers hail from automatically becomes part of the country where they perform? So when Malay Aborigines perform in Thailand, Malaysia is interpreted to be a part of Thailand? I hope there is a greater dose of simple logic here. You are attempting to insert your POV in supposed sensitivity when none are suggested in any way. Taiwanese Aborigines are free to perform anywhere they wish, and have complete freedom to decline to perform for any reason.