Some months ago, there was a really good article in my daily newspaper by a Russian journalist who had gone through his circle of friends and acquaintances and explored their ways of thinking and justifying the war (or not). The most fascinating, frightening and sad group was what he called the "Z people" who were not open to any kind of discussion and who were able to either ignore or rationalize away any counter-argument presented to them. So while some people were able to openly ponder a question such as "But why did we need to invade?", the Z people either brushed it aside or had an answer that was clearly illogical or absurd but still convinced them completely.
Of course, this is a fairly common phenomenon: when you discuss climate change, for example, there are some people who are completely convinced of their position and equally unable to even rationally consider other views. So it's a question of psychology rather than education, intelligence or interest. It's also fascinating that people's thinking can be compartmentalized so that while they may be very intelligent in general, they can also be completely "stuck" in some areas of their thinking. A good example would be someone like Frank Zappa whose unrepentant attitude towards smoking could not be swayed no matter what; in fact, he once said bluntly: "I am not buying the data", when the hazards were pointed out to him.
The sad thing about this kind of thinking in Zappa's case, for example, was that his scepticism towards governance and officialdom was in itself perfectly justified: the US government really does have a terrible record when it comes to lying to its citizens, and Zappa himself had some pretty awful early experiences with how arbitrarily and unjustly the US can treat its people. But obviously it does not follow from this that the government is always lying.
When it comes to lying, misdirection, false information and so on, Russians are in a much worse place than quite a lot of other people in other areas of the world -- and this makes the current situation so much more sinister.