If Nato didn’t exist, all of the ex-Soviet nations would be back under Russia’s control years ago.
There is a reason Lithunia, Latvia et al allow (Read: invited) Nato troops on their soil to plant hardware and do military exercises. There is a very real and ongoing threat from Russia walking back in and taking the country back.
Putin bleating about Nato being on his doorstep is a nonsense. If it wasn’t for him, they wouldn’t need to be part of Nato. Those nations joined to protect themselves.
Singapore, Malay, India etc getting their sovereignty back after WW2 was a good thing. They didn’t need Nato to protect themselves from Britain taking them back, and nor should the old Soviet countries, but they bloody do unfortunately.
Nobody wants war, that would be very very bad and I hope the solution is diplomatic.