You're desperately searching for bothsides-ist moral symmetry where there is none.
Russia bombed the Odesa opera house UNESCO world heritage site today. Last I heard the Bolshoi in Moscow is intact. That says all you need to know about who's committing war crimes.
Eliminating Russian cultural identity is not Ukrainian state policy. Russian state policy is to exterminate Ukrainian cultural identity. The genocidal rhetoric announced as state policy is one side only. The looted art treasures, mass child deportations, demolition of Holodomor monuments tells you this.