My ans: Because these people knows the history of what happened in Donbass before the war, as well..

My ans: Because these people knows the history of what happened in Donbass before the war, as well as the history behind Ukraine-Russia + the history & geopolitics between Russia and NATO.

This war is destined to happened.

So when it actually happened, people "who bothered" actually is not surprised, but more like "they cant believe" Russia really dared to, knowing the cost of doing what they had to do.