@Sea Breeze: The Czech Republic still holds claim to various Slovakian areas. There are about 150,000 Slovaks living in the Czech Republic still where the areas haven't been ceded. Yes, there is a peace between the two, but so did Europe think that Czechoslovakia was peaceful.
Besides that, you also have Russian-origin and the Roma people (not Romanian) that don't want anything to do with the Czech Republic or the EU (Roma are nomadic and to date fiercely independent). Being 'liberated' from the EU into their own little states would sound good to many Slovaks, Roma and other ethnic groups in the Balkan, and because the EU nor US leadership will cede any rights to date, those states will be more allied with Russia.
Yes, most of the Czech Republic doesn't want anything to do with the war, but nobody wants war, it just becomes a reality when there is a combination of weak, corrupt leadership that is significantly removed from the people they purport to serve, which accounts for most of the EU and the Balkans.
All Russia needs is a pretext to invade the portion they want to 'liberate' and within the EU there is plenty of pretext, not enough unity. Plenty of people on the outskirts of Russia and Europe have long histories of independence and losing a lot of people to fight off the Nazis, Napoleon and everyone that came before them. I think Putin understands that, the West doesn't. He wants to have trade relationships and entrench Russia into the global oil/gas trade, which has practically been forbidden by the EU.
It's hubris to believe that people as diverse and independent as Roma, Catalonians and ethnic Russians will ever bend the knee to the EU and could be ruled like the German dictatorship the EU has become, especially when they take away the primary energy resources people need to survive and build wealth.