Or maybe dehumanizing people is wrong no matter who does it. Just like Fascism. As long as its the same mechanisms at play, this is only a discussion about palpable degrees. Which when judged only by who does it always end on the worse part of the spectrum.
I believe its worth pointing out, that both Ukraine and Russia are using conscripts. As in innocent men that get murdered by their government for "reasons". So no, dehumanizing them is not acceptable. The cognitive dissonance necessary to justify this by citing fears of fascism is quite something.
It might also be worth pointing out, that this is lesser evil logic. Which if you recall is how we got fascism in Germany, by scaring people enough with the threat of the Bolsheviks.
edit: Also, just because OP is trolling doesnt mean that dehumanization is acceptable. Especially if that is the expectable reaction.