Maybe you should stop listening or reading Western media propaganda and understand the root causes as to why Russia invaded in the first place. You might learn something.
The “root causes” are Putins spin on his casus belli. The Soviets and Nazis did that too.
The real root cause is simple landgrabbing. Putin wants Russia to expand to its historical limits. He justifies it with a version of 19th century pan-slavism.
Because it is what Russians do. Always, and forever, Amen. Better to have the Ukes spill their blood to stop them between the Dnieper and the Don, than to spill American blood stopping them between the Vistula and the Neman.
One can find Putin speeches on YouTube even.