One does not ask soldiers to go door to door, that is if one respects the lives of his/her soldiers. First you level the city with air power or artillery and then you occupy it. Any building you are taking fire from is leveled again. It's not pretty but it is effective.
The "American armies" didn't destroy German cities: it was the RAF and the USAAF in massive bombing campaigns. It is possible to judge the morality of those bombing campaigns against German (and Japanese) civilians, but we were fighting an enemy that was both vicious and unrelenting, who had started their own versions of these kinds of indiscriminate acts first (London, Brussels, Rotterdam, Manila, etc., etc.).
The US Army fought in the rubble of German cities because that's where the holdouts of the Wehrmacht and the Waffen SS were fighting.
No comparison with the Ukraine which was invaded, has not conducted offensive operations against Russia and is legitimate in fighting for its own territory. Russia is clearly violating every international law, convention, and rule of humanity.
Zero comparison, bub. Didn't you learn anything in high school?
Fire bombing Moscow. I think that’s a fantastic idea. Hopefully the Ukrainians can achieve that some day. Soon stuff in st. Petersburg is you go going to be blowing up. Couldn’t happen to nicer group of people.