Churchill moved WWII into total war mode. It is true.
To claim the Russians are constrained when it comes to civilian casualties is stretching things. Russians have developed a deserved reputation for ruthless warfare.
Restrained, "civilized" warfare only existed for a limited time, essentially between Christian nations constrained by religion. Even then, the "rules" were often ignored.
I think that Putin is a bumbler. It cracks me up when zeepers think that his replacement would be more Democratic.