You didn't watch it. From his perspective, he's fighting on Russian soil. Ukraine is truthfully an artificial state and doomed like others before them and others to follow (regardless of where in world).
Why do you think the U.S. and Europe is flooding their countries with immigrants? Its to wipe out traditional identities that might lead to the break up of their artificial unions {plus to keep wages down so inflation can erase the relative value of the debts they owe}.