You are told, but do you listen??? They are not the aggressor, you folks simply know not the real story there, just the lying propaganda courtesy of Joe Biden, Barack Obama, and a totally corrupt US senate, and the most sinister intelligence agencies extant, all of whom are fully invested in the naked perpetration of war!
Do you folk not recall why Putin took back the Crimea, it was due specifically to ethnic cleansing (recall that term from Serbia?) of Russian Ukrainians by actual Nazi's, Nazi's sponsored by Barack Obama & his designated point man on Ukraine, Joe Biden!
Those Nazi's are/were the fighters from the area around the sea of Azov, perhaps best known to the west as "the Azov Battalion," and they had been collecting up Russian Ukrainians and burning them alive, among a slew of other atrocities, they are also the direct lineal descendants of the Nazi's who staffed most WW II German death camps, almost all of whom were Ukrainians from the regions around sea of Azov!
That is what brought Russia into the Crimea and the Donbas....