Peter,
During the times of SU none of strategic war plans were shared with "satellite countries", especially with Poland that was always considered as a non-reliable one. Maybe there were some paper exercises by military students of Polish general staff or something like that. Or, alternatively, "polish conservatives" fabricated some papers to generate noise and attention. Words like "targeted for its cultural and historical significance to break the morale of the Danish population and army" were never used in SU military documents. Somebody interpreted some crap papers in the way to excite general public...
You'd better refer to SIOP-62 or earlier Dropshot plans of US.
E.g.
https://nsarchive.wordpress.com/2011...s-of-overkill/
A couple of excerpts:
"....if the full U.S. nuclear force assigned to the Single Integrated Operational Plan (SIOP) struck the Soviet Union, 54 percent of the total population would be killed, that is some 108 million of a total population of 217 million. "
"... The target list also included almost all Soviet cities with populations of 50,000 or greater. The alert force would target 199 cities, while the full force would target 295."
But since it is a thread for military, what's the use to discuss who was more montrous? That was such a time...
US carpet bombing of Vietnam using napalm and "agent orange" chemical would now be considered as a war crime, but only idiots would attempt to bring the crews to a court now. That was such a time...