Additional reading:
BBC Reporters, CBS News, and New York Times reporter who were actually in the city the day it happened who report mainstream news got it all wrong. BBC Source | CBS Source | NYTimes Source
Readings into what happened with the protests:
https://redsails.org/another-view-of-tiananmen
https://www.liberationnews.org/tiananmen-the-massacre-that-wasnt-2/
What would you say on the Kent State Massacre where the Ohio National Guard opened fire on college protesters? What of the MOVE bombing in Philadelphia where cops dropped bombs on a residential street and allowed people to burn alive, the remains of some of the children being kept in a university storage until only recently. How many people woke up one night to the sound of their door being caved in only to be immediately shot for trying to defend themselves from a no knock warrant. The terrible forces of the US government terrorize us far more on a regular basis.
Just like GaveUp said, the use of the military made sense, the US has a long bloody history of interference in other nations' affairs. Look at all the coups the US had started in South America alone, how many despots and dictators were installed to allow US multinationals to pillage these nations as they murdered thousands. Were other socialist nations supposed to just lay down and not fight to keep the hard won victories?