In the context of WW2 Bo said nothing wrong
Many people here seem shocked by what Bo said... While in reality there's nothing wrong in the context discussed.
We're talking about WW2:
-bombing cities, completely leveling them to the ground, was the common (and acceptable) strategy of the time.
-Nuking was not considered morally wrong until the 60s, in 1945 it was considered just another kind of bomb.
-Considering what Soviet Union was doing in the 30s/40s (they were no different than Germany, Italy and Japan) it was logical that the allies could have invaded them (operation Unthinkable probably being the most famous real example) and they probably should have.
You can argue about the ban being justified or not (perma ban is ridiculous), it won't change that fact.
Basically said, you can't judge 1945 strategies with today's moral compass, always judge events in their respective context.