Well... The EU: https://www.osce.org/files/f/documents/e/7/233896.pdf and the USA RAND https://www.rand.org/content/dam/rand/pubs/research_briefs/R... do not agree that much... Recently disclosed old ops like https://www.cia.gov/readingroom/docs/AERODYNAMIC%20%20%20VOL... suggest that's not a new thing.

Long story short: yes, is Russia that have crossed the border, but no, it's not it who start the war in reality.

It was Russia who started war in 2014, and - now officially nazi - escalated in February. None of your links claim or suggest otherwise. What they describe is just politics - and does not on any way give Russia the right to invade.

What is the right to invade for you? Something like pretending there are hidden mass disruption weapons you know are not there but you want to invade because the about-to-be-invaded country decide to sell oil in € instead of dollars? Or pretending that a country you want to control hide someone you look for? Or pretending there is a repressive government while you just pursue United Fruits co private interest?

All of the situations you've mentioned were crimes against humanity. One day Americans will realise that. But those wars are over, while the Rashist invasion is taking place as we speak. Also, look at the scale: Russians killed over hundred thousand civilians in Mariupol alone.