[xdennis]

> isn't NATO reaching Russian borders a threat?

No. NATO is a defensive alliance. Easter European countries are in NATO specifically to protect against the kind of aggression you're seeing in Ukraine now.

Russia used to regularly invade neighbors: Poland 1939, Romania, Baltic countries, Finland 1940, Everywhere 1944, Hungary 1956, Czechoslovakia 1968. None have been invaded since joining NATO.

NATO expansion is removing threats, not creating them.