"why would anyone want to bomb Dresden?"

Even in the midst of the war, the bombing of Dresden was a controversial act. Dresden was known as "Florence on the Elbe", a Baroque city of art and culture.  Its destruction in 1945 was largely irrelevant to the outcome of the war, and has been interpreted as an act of revenge for the bombing of British cities.  Defenders of the bombing argue that the targeting of civilians was necessary to break the morale of Germany's military.