It is a display of nationalism that has no place in a peace-loving country like Taiwan. Members of the DPP should know better than anyone else that such reckless acts are exactly the type of comportment they often deplore among Chinese nationalists across the Taiwan Strait, who have turned such barbarism into a national sport.
Taiwanese have been overwhelmingly even-handed in their response to the incident. The DPP wins nothing by acting like a bully. Cool heads must prevail, at every level.