> The war logically follows from Russia’s security goals.

This framing is found only in propaganda put out for foreign consumption. Professionals like Kozyrev, who was the minister or foreign affairs of the Russian Federation (1990-1996) and in charge of rebuilding RF's international relations after the disintegration of the USSR, have openly called this bullshit that only manipulated idiots believe, because the "security goals" argument makes no sense whatsoever if you spend more than 10 seconds on it.

According to Kozyrev, instead of a patchwork of dysfunctional countries at war with each other like in the former Yugoslavia (with overspilling effects on Russia), EU and NATO integration helped build modern, peaceful and predictable countries in Central and Eastern Europe, which in practical terms meant "free-of-charge security" (his term) for Russia. What's there to complain about?

Furthermore, Mearsheimer et al treat countries as monoliths and completely ignore the competing interests of groups and individuals within them. Russia of the early 1990s was a flawed democracy; today it is a totalitarian dictatorship. The war against Ukraine is a downstream effect of the destruction of Russian democracy and consolidation of absolute power into the hands of Putin's security apparatus gang. Putin wants to be remembered as a "great ruler" and that's all there is to it; a small man who managed to gain absolute power, no different from Hitler.