There are Russian speaking communities in each of the Baltic states that have constitutional issues with their governments. I seem to remember one of Putin’s gambits is to stir up controversy over the fate of war monuments celebrating the heroism if the Red Army in those countries leading to protests by this oppressed minority. There have also been incidents on Estonia’s border with Russia, which is in the Russian speaking part of Estonia.
Latvia, Lithuania and Estonia are small states with very serious concerns about Russia. Anyone conversant with the sad history of those states in the last century will understand how nervous they are. Russia is feared. They were anxious to join NATO and the EU as soon as they could after the collapse of the USSR.
One of the reasons the European Union came into being was to bind European states together by trade to develop a European economy. It has been a great success in that respect. It is good for small states. However it is underpinned by the size and strength of the German economy.
If it were to create some kind of European army, it would require a big input from Germany. That would set off a lot of nervous twitches all over Europe. There would also be a huge push back from within Germany itself.
Putin relies on a perception that NATO and the EU are expansionist and existential threats to Russia. He is anxious to keep Belarusia and parts of Ukraine under Russian control rather than allow them to drift towards the West.
The Polish border refugee crisis creates a problem for the EU. The annexation of Crimea and the threat to other parts of Ukraine is a problem for NATO.
However……Russia is invested in the global economy, as much as any other large state. It’s economy is dominated by Oil and Gas. There is no way it wants the revenue associated with those pipelines to stop. Putin priority is to get that Nord Stream 2 natural gas pipeline to Germany working.
Now all of this is known to diplomats in Europe. The US diplomats….maybe the Trump years have undermined the diplomatic service. But the generals in NATO certainly know about troop build ups on the Russian border and these are Putins response to arms deal between Ukraine and NATO countries for missile defence systems.
A lot of these challenges are coming from the perception that the US is withdrawing from its leading position in the global balance of power. I guess this had arisen from exasperation with the costly interventions in Iraq and Afghanistan.
Biden needs to be quite clear where the US stands regarding the global balance of power and strengthen trade links and alliances. Europe could also make an effort to invest more in its NATO insurance policy. The South China Sea Question needs a counter move and some solidarity from the countries affected. There is a lot US diplomacy could do.