I am surprised that some of you believe that most people supporting Russia and Putin feel they are protecting themselves rather than believing in what they are saying. Some will be being protective. I doubt it will be the older, less educated parents and grandparents. There is every likelihood that they have taken the brainwashing on board.
We need to understand and believe this can happen. After Brexit, you would think everyone would be aware. During Brexit, the people who believed were being told something that concurred with their existing thoughts. In both cases, it was/is that "the enemy" was "bad" in ways they had been drip-fed over decades to believe it was. In both cases, the propaganda is believed because the group who agree is large. Yet we all know majorities can be wrong.
There are small groups who know what is happening and try to get the message over. I don't think they will succeed. In decades to come, people will tell their children that everything the Brexit leavers said was true, however much evidence there is to the contrary. This happened in Germany. People continued believing that the reports of what had been done in their name could not be true. Some died believing that.
In Russia, they want their country to be good. They will continue to believe their forces went in to help and protect Russia. Of course they will.
That's why we have to fight for truth. We can see, all around the world, where our compliance could take democracy away from us buy constant and clever lies.