A viral online video that shows a woman insulting a Chinese civil war veteran in Taiwan has drawn condemnation from officials and experts on both sides of the Straits.

The two-minute clip filmed in a park in Kaohsiung shows Hung Su-chu, a self-proclaimed citizen journalist, confronting an elderly man who was among those who retreated to the island after the war ended in 1949.

She first calls the man-identified later as 89-year-old Chow Fu-wen - a shameless mainland refugee and then demands he return to the mainland.