No one was ever going to invade a country with ICBMs.
The invasion occurred because of Ukraine's movement toward the EU which, eventually, would curtail the ability of Putin and the oligarchs to swindle Russias oil and gas wealth through rampant price fixing and kick-backs. Everything else was rhetoric.
You mean beyond the 2014 Maidan Revolution and restoration of the 2004 constitutional modifications that began the process of moving toward the EU? Or the 2019 constitutional amendment that placed joining the EU and NATO as a strategic objective for Ukraine?