It's actually upsetting to read some people defend an illegal war of aggression in this thread. Just practice the golden rule for a change and imagine yourself being in the same situation. What if it was your country being invaded? Would you take up arms to defend your family, your friends, your neighbors? The bombs are dropping everywhere, and you have to hide in basements to prevent their terror attacks from taking away all that you hold dear.
Of course a country being invaded has the right to defend themselves and the right to fight back. The aggressors could end this war immediately but they wont because their leader is an insular autocrat. Isolating himself and giving orders without considering the best for the rest of the world. Devaluing human life from on top of a pedestal. This is the danger what happens when one single individual gains too much power and the rest of the world needs to be unanimously against it regardless of blind idealism.