The war was Georgia's fault. Georgia started it by attacking the independent nation of South Ossetia. Russia just ended it.
South Ossetia had declared its independence in 1991. Russia has had peacekeepers there since then in order to protect them. Georgia invaded a territory where Russian peacekeepers had been stationed for nearly 20 years! It was completely Georgias fault!
Remember though that South Ossetia declared their independence right after the fall of the Soviet Union. They did not want to be part of an independent Georgian nation, and therefore declared independence. Seeing how many new countries were made from former Soviet Oblasts in 1991, its surprising that Georgia was so bitter about this.
I have researched this topic not so long ago, and I agree with you.
Because of the heavy information war and a lot of disinformation by Georgia,
it was quite difficult for me to find the truth.