Didn’t change anything after Tiananmen. People know what happened there and turn a blind eye.
The HK guy with the “we need a 2nd amendment” sign gets it. Without the ability to defend themselves it will be another massacre.
The Tienanmen massacre wasn’t completely transmitted to the rest of the world - there are already people in place with satellite phones (that the regime can’t intercept or censor) that will stream the whole thing live to the rest of the world.
They won’t be able to sweep it under the rug like last time.