Would it be more moral to stay with the Russians and kill (probably more than two) Ukrainians instead?
War puts people in terrible positions. I don't know this guy or his story, and I think he may either be saying or receiving some half-truths (his comment on "you will be provided for for the rest of your life" at the ripe old age of 28 made me raise my eyebrow), but the sad reality is that people kill people when they're in war. I don't think it's fair to label the guy based on his situation.