You ignore the international laws, because it's just convenient for your own claim.
Targeting civilians, which nothing else areal bombing is, was already a crime by international law back when WW2 started. Watch the linked video, and see for yourself. After only 3 mins in the vid you should know it..
Harris strategies and methods have been controversial and criticized by Brits themselves. And he himself claimed that if he had to make the decision, he'd do the same thing again and bomb Dresden the same way again.
How do I compare him to Hitler? Hitler was in absolute power, he was in charge and has the full responsibility for the murders committed by his regime. He targeted ethnic groups and tried to eliminate them.... Here's the similarity. Harris too wouldn't have hesitated to target and eliminate an ethnic group. Only difference, he was not in the same power position to make such decision without having to answer to others.