Green_Power
Chieftain
This. I played with Shaka in my last game and I could get away with capturing 4 capitals because I didn't wipe the Civs in question completely. I also had Cathy and Maria nearby, which tolerate warmongers. That helped a bit, I admit, but I didn't get denouncements from the other Civs either.Yes, it is distressing the diplo when concerned with wars still has some broken and silly aspects however what the OP did to trigger 7 denouncements was to completely eliminate Denmark.
The AI's hate it when the human player genocides another civ. Replay it and leave Denmark with one lousy pillaged and starved city on poor ground and then make peace with him and I expect you won't harm relations with the others.
\Edit: Oh, I forgot to say. I was never attacked by the 4 Civs I took the capital from. They had reasonable empires in Modern Era but they NEVER attacked me once, even hating me all the way. I think that when you take their capital, the Civs are mostly finished.