I'm sorry but what do you think of an individual who wakes up one morning and decides to invade a peaceful nation?
Ukraine is an independent, separate sovereign nation
What are we debating exactly? Do you think it is right what has happened?
Ukraine was not a "peaceful nation".
For 8 years the Ukrainian Army has been shelling civilian areas in Donbass/Luhansk. This is in breach of the 2015 Minsk 2 accords, which are also a UNSC resolution. I know this is all over your head, but I'll explain anyway.
The ceasefire violations, lack of any attempt to negotiate with the separatists as stipulated in Minsk 2 and the continued shelling of civilian areas, killing thousands, all recorded by the OSCE necessitated Russia to intervene under the R2P doctrine.
The build up of Ukrainian troops on the borders of Donbass threatening invasion showed Ukraine to be anything but a peaceful nation. The 2014 coup has also ensured that they are anything but an "independent sovereign nation". They are clearly US/NATO vassals as evidenced by the amount of US/UK/NATO aid, arms and mercenaries? pouring in from the real leaders of this US vassal.
Your questions and the framing of them show that you have no understanding of world affairs and no interest in any real discussion about it. You just want to hear, "Putin bad, Russia bad".
In truth the western machinations to interfere in Ukraine have been ongoing for decades and if you knew anything about the matters you are attempting to discuss, you would already know this, but you don't.
2014 is when western plots went into overdrive with the Maidan coup. You are nowhere near understanding what is going on in Ukraine and seem to think it started only this year when,
"peaceful, sovereign and independent Ukraine who were just hanging around minding their own business shelling civilians and threatening, along with NATO, to put nuclear missiles next to Russia's border were suddenly invaded for no other reason than Putin just waking up and deciding one morning"
Do some reading!