Poland and Czechia and Poland and Lithuania have a mostly peaceful past and they have simmilar population sizes, there is no strong hatred between them, its like saying Sweden and Finland might go to war, Russia is way bigger and has a much bigger army and population and has a long history of wars with Poland and the Baltic nations, and there is a mutual hatred between us,The only country of those you mentioned that could pose a threat in the future is Germany but the hatred between Germans and West slavs is mostly gone and Germany doesn't the ability and will to bother with any agression towards these countries.