Every nation is under some invisible curtain that is built up by local propaganda and false sense of nationalism.
I totally agree!
Yes, in the era of social media it's more difficult to control people's minds... but still in Russia there are many people below the poverty line, I guess their lives will always be closed by an Iron Curtain

Yes. Secured people can leave the country if something happens. But the majority of the population will obey the decisions of the authorities