Yes, U.S. and NATO were "preaching for deescalation" while shipping millions of dollars worth of weapons to Ukraine. All while deploying "instructors" and supporting a planned Ukronazi attack on Donbass republics. Of course Russia wasnt just gonna watch and let that happen.
Russia also offered diplomatic solutions many times (since December, and in fact since 2014). Those were all rejected, and now it seems that the time for diplomacy is over.
Edit: forgot to add, just a few days ago Ukraine threatened to develop nuclear weapons. That was obviously a red line for Russia.
This is so funny because Russia has the most advanced military in the world. Particularly hypersonic missiles, which the u.s. wont have for years. And working missile defense systems.