They’re also flying the flag of the ROC next to it.

I honestly suspect that the majority of Taiwan’s supporters have no clue about its history other than its founding by anticommunists. Either that, or they have a deeply cold and uncaring response to atrocities like these:

Economic and political conditions worsened for the people of Formosa after Chiang’s régime took over from the Japanese at the conclusion of the World War II. On February 27, 1947, a parade of Formosans was marching to present a petition to the Governor for a redress of grievances. Ambassador Stuart tells us what happened:

Without warning a machine gun mounted somewhere on the government building opened fire, swept and dispersed the crowd and killed at least four. (Page 926.)

Public resentment and anger mounted. So, Chiang’s Governor invoked martial law on the next day. And as Ambassador Stuart tells it: “Armed military patrols began to appear in the city, firing at random wherever they went.” (Page 927.)

A few days later a delegation of prominent citizens called on the Governor. Ambassador Stuart explains what happened:

They urged the Governor to lift martial law so that the dangers of clash between the unarmed civil population and the military would be averted. This the Governor agreed to do at midnight, March 1, meanwhile forbidding meetings and parades.

On that day busses and trucks, filled with squads of government troops armed with machine guns and rifles, began to sweep through the streets, firing indiscriminately. Machine guns were set up at important intersections. Shooting grew in volume during the afternoon.

At no time were Formosans observed to have arms and no instances of Formosan use of arms were reported in Taipei. Nevertheless, the military were evidently allowed free use in what appeared to be an attempt to frighten the people into obedience. (Page 927.)

(Emphasis added. Source.)

Which genocidal fascist nationalist regime?

This looks like the house of that one corrupt official in the Chinese TV series In the Name of the People

You guys realize these extremist posts get you downvoted right… While different ideologies might see this “event” as a positive or negative thing, it is still a murder. And should be respected.