A Russian here under a throwaway account. I've seen very few open supporters of the military invasion on social media. But most Russians, reached by TV or social media propaganda, carry on 3-5 factoids regarding Ukraine that somehow invalidates Ukrainian position completely.
For example, just from today's talk (face-to-face):
* that Ukrainian forces supposedly committed crimes in Donbass region -- when I ask who in particular and how, these people fail to answer. When I say that they had full right to suppress armed riot of Girkin & co, they switch the topic.
* that the government were illegally overthrown in 2014. I challenged that with the fact that Yanukovich's own party voted to introduce an president interim and start new elections.
Both times I pushed the interlocutor and asked if I lied, and they have nothing to say, nor have more facts, but jump between topics all the time, switching from facts to questions -- like "did they start living better?" or "what about those who died in Odessa protest?" I guess this demagogy is enough for those who want to justify their stance, and to claim own moral superiority.
I asked if they support the invasion, and they say they don't. I'm sure they'll have to make up their mind, but I'm afraid people can choose whatever more convenient to feel ok.
A recent sociological surveys made in January showed about half of population being on Putin's side, even 40% of those in political opposition to him. Sociologists confronted people with evidence of Russian military buildup, and respondents usually answered that this was "Western propaganda" and tried to avoid further discussion.
I can't read minds of the elites and secret service generals who constitute the Security Council, but it seems this is partially what they think -- secret services are very suspicious of everyone and treat everything as a threat. This leads to believing in conspiracies, and justifies agression.
As for me and many others who value the open world borders and don't want back to USSR, I'm most worried that we're going to be under severe sectoral sanctions, with many industries in serious crisis, like in the 1990s.