Not keen on Putin apologists who miss out all the relevant facts, yes quite right but "nowt funnier than folk" most things start because of history.
In March 1954, the Soviets then sent the Western allies a proposal for the USSR to join NATO. In a letter to Georgy Malenkov, then the USSR's head of state, and Communist Party General Secretary Nikita Khrushchev, Molotov laid out the benefits of joining the North Atlantic Pact.
He wrote the action "would make things difficult for the organizers of the North Atlantic bloc and would emphasize its supposedly defensive character, so that it would not be directed against the USSR."