What i don't understand here is why all the talk is about "deserving" death or not.
This wasn't a trial.
There was no time to think straight.
There was an immediate danger, in a situation of shock (who wouldn't be shocked if his quiet evening turned into a tie-and-rape party with armed attackers ?).
The man was surprised, then got a faint opportunty to fight back and seized it, pretty much as survival instinct.He fought the threat, and happened to kill two of his attackers while doing it. Think of the adrenaline of the situation, of the need to make quick decisions on the actions to do when you don't know for sure that you'll still live in the following seconds.
As i said again, it's sad that two men had to die, and a better outcome would have been better. But one can't blame the man who had to defend himself. As his reaction shows (the bit where he was just sitting while holding his head with his hands after the fight), himself probably didn't think that the attackers deserved to die and now feels bad about it, but that's how things happened. It may be a cliché, but life isn't about people getting what they deserve or don't.
I'm sad the attackers had to die, i'm sad that this man now has to live with blood on his hands, and i'm glad he and the two women can live another day. That's about it.