Your analogy between Taiwan and the U.S. is completely inaccurate and wholly misplaced. A historically isolated island country of 23M that's culturally homogenous and ethnically 95% Han compares to the immense diverse culture of the U.S.?? Why don't you compare the U.S. to Japan, Somalia, Saudi Arabia or Switzerland for more vacuous analogies about gun violence? Our cultural antecedents created the gun violence over centuries. The U.S. has 4.6% of the world's population but 42% of all firearms. 

Try purchasing a gun in Japan, let alone Taiwan as an ordinary citizen. Try owning a gun in Japan as a gaijin (foreigner) versus all of the foreigners in the U.S. illegally who possess firearms? Look at the open underground trade of firearms in the U.S. at gun shows. Historically, Taiwan had no influx of guns because the government and the people agreed to limit their availability. But I guess if we were all Han the world would be a better place? BTW Ask Beijing about that worldview.