The types of leaders that we see in North Korea, Iran, Pakistan (against India)…..maybe not always in their right minds. And if the Iranians get their nuclear bombs, then the Saudis will want theirs, as will the UAE and others. Less nukes out there the better.
Now in 1945, the primitive a-bombs saved the US and its allies at least a million casualties that would have been suffered in the invasion of Japan. Probably ten times that number in Japanese casualties. Best decision Harry Truman ever made.
Dresden was primarily a British operation, and the Brits did not like the Germans too much in 1945 since they feel the Germans started it with the bombings of Warsaw, Rotterdam, and of course London.