Sometimes it helps to put the propagandists in their place. There are some simple-minded republicans that are easily influenced by them, and this war needs the support of the simpletons as well as the wise.
I didn't say the military acted independently. What Ukraine's motives were is irrelevant to the fact that they started the artillery shelling of the Russian-speakers on February 16, 2022 as reported by the OSCE. Each day Ukraine fired a greater number of artillery 4ounds. Feb 21 ~1200+, Feb 22 ~1800, Feb 23 ~2000+ (from memory).
This is like saying Ukraine committed suicide by shooting itself in the head five times and their motives for suicide were irrelevant even though they were getting ready to testify against a mob boss in a murder case.
I think you're complicating things to distract yourself from the reality that 8 days before Russia invaded Ukraine were firing artillery at Russian-speakers in violation of the Minsk agreements. I'm not a mind reader so there's no way for me to know what their prime motive/motoves were.