How will EU and NATO countries relate with Russia if that happens ?
Who are the allies to be identified with Russia? As at now every businesses, companies and organizations were departing the country and no one has come out boldly to make a stand with Russia, meaning that all that Putin is doin is unethical and not tolerated by any culture or continent, it is believed to be an act of massacre, even the millitary that goes into war always have a plan of rescue of the innocent citizens, females and young ones.
On the other hand, the imposed sanctions will work and continue to have a devastating effect on the Russian economy, even if they are lifted in the near future. Therefore, soon Russia will become a poor state, if it still retains its territory, which I deeply doubt.