Sorry, I don't get it. But, that may be my personal preference. It seems to me that the sheer act of fighting AGAINST evil is far more productive than showing guilt. If someone came over and spray painted my car, I would MUCH rather them ACT to fix my car and perhaps roam the streets trying to stop other people's cars from being spray painted than sit and tell me how sorry they are.
Like I said, I think there is a happy medium. Angel expresses guilt and fights against evil at the same time, why can't Spike do both? Spike tells Wood he doesn't "give a piss" about killing Nikki, but Angel tells Holtz he's sorry, even when Holtz stole his son, and he admits it doesn't change anything. IMO, Angel was the bigger man here. What would you rather, someone saying "I'm sorry and I'll fix your car" or "I don't give a piss about your car or the trouble it caused you, but I'll fix it anyway." Of course most people would rather the first option, and someone who says the first option should get a lot more respect.
And there IS a big difference between not being exactly "at fault" for killings he did as a vampire and then fighting to get his soul back. Just the same as if you get someone hooked on drugs by shooting them up in their sleep, you can't be stunned if they then do anything and everything to get drugs. Steal, prostitute themselves, whatever. But, if they decide, "Nope, I no longer want to do this, I'm going to fight my way out of this drug fog instead" EVEN if it's to impress a girl, that doesn't make the fight out of it any less hard.
But I don't think that's what Spike is claiming here. He's take the position a lot of the fans take concerning Angel and Angelus. Spike is denouncing any responsibility for what he did as a soulless vampire as if he had no control over it. If he wants to take that approach he has to take that with getting his soul as well, if he wants to act as if he's two different people then fine, but he can't take responsibility for getting his soul if he isn't going to face up to the fact he is responsible for all the lives he took as well.
And it isn't even just concerning the soul. He tries to blame Angel for making him a monster, instead of being a man and taking responsibility for his own actions. He tells Angel he made him a monster, but Angel's right, he "just opened up the door, and let the real Spike out." Spike has to take some responsibility for a change, he can't blame Angel or the lack of a soul for all the things he isn't proud of but brag about things he is.
Personally, I think you're putting a LOT of emphasis on the impact Dana had on Spike. Yes, he did actively SAY something about it, but he was slapped in the face with it. But, it's not like it drastically changed him or the manner in which he lived his life. He was just as snarky and selfish as ever afterward.
You're right, he was. But at least it made him stop and think for a moment about the lives they did ruin, he never did.
It wasn't until
"˜Shells' that I actually began to like Spike's character again. I had respect for what he did in
"˜Chosen' but after being resurrected he really ruined that for me. He constantly brought up saving the world and how he deserved a reward for this, when Angel and especially Buffy, even Xander, have saved the world before and never did this. He made judgements on Angel from the second he arrived at Wolfram and Hart without bothering to find out why they actually took over, he showed no compassion for people like Dana and tried to blame Angel for everything bad he did, and he tried to paint getting his soul back as part of his "destiny" and because he knew it was the right thing to do, when all season seven of Btvs he'd claimed it was for Buffy and Buffy alone, he'd stated this a number of times. He just really showed an ugly side of his personality to me, and I lost a lot of respect for him. It wasn't until
"˜Shells' and he said he wanted to start fighting because it's what Fred wanted and it's what *he* wanted, that I started to like him again.
I've always respected Angel's character because he'll never shy away from accepting responsibility for his actions. And people may think he's broody because of this, and he can be really hard on himself, but I really respect someone or a character who'll face up to the consequences and not blame others or make excuses. He'll stand up and try and repent for the things he's done, he isn't afraid to say sorry to someone and he'll help people.