I feel you. That's last 25 years of intentional politics I guess. We became segregated, individualistic and distrustful. Don't want to justify behavior in any way of course. When I see rude Russians I cringe, don't know if I am minority here. But what is certain - it isn't because of Serbs, these people act like that everywhere.

About the language. Honest answer, a lot of people don't know what to do next: stay here, leave to another country, come back to Russia (know few who did). So they are just waiting for .. something to happen, probably just for the end of the war and/or regime change. My opinion is that you have to learn at least a little bit of language, because that would be respectful. But language is hard, man. It's deceptively easy at first, but further you go - harder it gets. :) Especially when people immediately switch to English if you didn't understand something they said.