I have seen this reasoning within my group of pro-Putin friends. They try to discredit the Ukrainian defence by putting it in the same basket as the invading forces, then conveniently forgetting what the Russian army is doing in the first place. Another example they have used is that the Ukrainian government is bad, because they put an opposition leader under house arrest. Ignoring for now the circumstances of the house arrest itself, but I'm sure the people would prefer that over what's happened to Navalny. Fighting is the only way to prevent that of course.