He's not hearing it as empathy, he's hearing it as pity and that pisses him off. It doesn't matter what you mean, it matters how it's heard.
Also, one great thing about recovery is getting over the need for explanations and apologies. This is important in relationships with alcoholics, and if you still have that need I'd suggest beginning your own program of recovery if you haven't already. If you have begun a program or recovery, consider working with your sponsor regarding this need of yours.
Take what you want and leave the rest,
Cyranoak
P.s. I used to need explanations, apologies, and closure. One of the biggest gifts Alanon has given me is that it has completely freed me from these needs (which I consider to be very, very self-destructive). Thank God!