You think its changed?
First he wanted Crimea
Now he wants eastern ukraine
If he stops at east ukraine for now, how long before he comes back for more?
Do you think long lasting peace is possible with these people? The only way that can happen is if you become a vassal state like belarus
First he wanted Ukraine because he had Ukraine, now he wants east Ukraine because its the parts of the country he had, that cared about. How can a long lasting peace be possible with constant NATO encroachment and color revolutions? If Putin makes peace in Ukraine, will NATO militarize the west even further and use it as a launching pad for more offensive operations?
We make peace with our enemies not our allies. If it wasnt a hostile relationship we wouldn't be seeking peace. There's no condition of a peace deal that absolutely guarantees security. The only guarantee is when you raze Carthage to the bare dirt and salt that earth. These are the basic conditions of resolving any conflict, Ukraine and Russia aren't unique.