Pressures like economic calamity or war can easily make the whole thing break apart. Given the current state of the European economy, calamity would be terribly easy to induce for any major outside power, such as Russia, and I do not expect that to be any less true in future years.
"For what is Evil but Good-tortured by its own hunger and thirst?"
- Khalil Gibran
What's not to love, for them, in the way Mr. Putin is reinventing Russia these days? And what not to hate in Kiev and Lviv?