Well, in "real politics" terms, the Russian narrative becomes "we stole this fair and square - we conquered this much territory, it has historically been ours, so you should make a treaty giving us this and we're done" whereas the Ukraine's narrative is basically "Russia holding that territory is unjust and fundamentally violates the democratic aspirations of the people there, so we need X many years of war and X thousand dead to regain that land".

Which is to say Ukrainian narrative is hard to embrace unless someone is already energized by a need for justice to nations, which might not be certain segment of America.