People should educate themselves about Geopolitics and History of U.S.S.R.
Ukraine was part of the Russian Empire .Lenin decided to subdivide Russian empire into Soviet Republics . After World War 2 parts of Poland were added by USSR to Ukraine and Belarus.
Natos and U.S. aim is to further subdivide Russia hence Putins concerns. Further Kiev has led a Military campaign in Russian speaking areas in Ukraine which as Putin actually calls it a Genocide.
Bottom line NATO will have to negotiate .The earlier the better.