Sounds like he's engaging in the same kind of rationale that holocaust skeptics are. Except I don't hear any Germans screaming "Never again"!
The bombing of Dresden may be compared to our bombing of Japan or Germany's bombing of Britain, but to compare it to the Nazis' systematic attempt to annihilate an entire people (civilians, women, children) who were not at war with them is absolutely obscene. And I'm far from being a "holocaust liberal."
Shame on you.