It is because people think they are on the right side of politics so much, that whatever they say or do, can't be criticized to the slightest extent. I dislike the declaration of "truth" in wartime quite a lot as it doesn't seem to be sensible. The black-white thinking is an absolute cancer in this internet society as you can tell by the amount of comments thinking I would side with Russia when criticizing the wording of the article, not even the Ukrainian action itself.

They just assume whatever statement isn't in full accord with them, means you are in full accord with the extreme opposite end of whatever spectrum. I highly advise to avoid political movements and friend groups with such extreme tendencies which favor shouting down over any discussion as they will circle jerk themselves into pure insanity.