Nobody should be saying that (and I don't think people actually are).
War is horrific and there's definitely been war crimes perpetuated from both sides - and it's why it shouldn't be happening, especially nearly three years after it started. I've seen Twitter accounts that show videos of Russian soldiers being blown up by drones and glorifying it. I've seen that shared by Evertonians. It's sickening. It's all horrific.
All that should be taken into account is that there's factors that have contributed to where we are now, and I'd argue a big reason why the war is still taking place is down to those factors. The US, UK, most of the major European nations shoulder their responsibility for that. Not all of the responsibility. There's nuance to be had, as ever.
Of course, it's easier just to go to the extreme view isn't it.
It’d have been a lot easier to not invade Ukraine in the first place, but here we are with people making thinly veiled attempts to justify and defend Mad Vlad the misunderstood and his meat grinder.