But how are you defining this so-called sin? ...if you stick to your beliefs you are sent to this place for a year or are otherwise punished? Does that seem right? Justice using a blunt instrument handing out a judgement disregarding values that you have held throughout your life?
Well, we can't know for sure what sin is, since none of us knows G-d completely. But I'm OK with that because I trust that G-d loves me even though I'm not perfect. (He's said as much, and I believe Him). It's not up to me to decide if other people's lives are being led according to G-d. I have a personal opinion of homosexual sex as it applies TO ME, but not how it's applied in general. I can't know G-d and I can't know any other person perfectly, so how can I possibly judge?
Ultimately, all standards of justice, right, wrong, sin, etc. are arbitrary. No-one can have more claim to know them than any other. We all pick the ones we'd like to follow. I chose to pick the ones outlined in the Torah. Everyone else is free to pick whichever they see fit.
This is the diff between a King religion and a Teacher religion. Basically in the King religion the following popular rules apply:
1. The Boss is always right
2. When the Boss is wrong, see Rule No. 1
3. (For my belief system, anyway) The Boss loves you and wants you to be with Him. He's given you pretty good guidelines and a route to travel for when you F-up.
In a Teacher religion, it's not enough for the Teacher to say she is right, she has to educate and prove to her students why she is right. It's not enough for someone to tell you you are doing something wrong, you must learn, on your own, why you might be wrong.
This is a big part of my beliefs, but not their entirety. It's GREAT to know why you're not supposed to do things, but sometimes the reason is just "Cause that's how G-d designed it. Just trust that it's for your own good. Or believe that you're playing a game by a set of arbitrary rules, and if you wanna keep playing, just follow them. They're easy." Of course, you must come to understand for yourself how G-d designed it and what He wants from you. (Funnily enough, in Judaism, the men who help us understand what G-d wants are simply titled "Teacher".)
Plus I don't see anything accomplished by simply being punished for bad behaviour. A Terrorist blows up a bus killing several people. God punishes him, is that what the victims want? How does it help them to know that this guy is undergoing physical torment? Even worse is when he is simply forgiven.
Karma & Rebirth is the only correct & logical choice - Here the Terrorist is forced to accept responsibility for his actions. No forgiveness but no physical abuse either.
But isn't rebirth just another form of punishment? Only it comes to the Terrorist as a sucky next life. Who's even to say if he'll understand the lesson? I have to say, I see huge potential for a rebirth faith-system to lead to thoughts like "My life sucks. I must have been a real jerk in my past life. Well, nothing I can do about it now."
My beliefs hold that the very act of a sin takes farther away from G-d. The state of being away from G-d is a punishment in itself. If you do teshuva, you return to being closer to Him. After you die, if you've got sins left un-returned from, you have to do it after-the-fact before you can be close to G-d. Plus, when everybody dies, they do an accounting of their life before G-d. They face Him and go through every moment and take responsibility for the wrongs they have done and the things they have set to rights. That's the ultimate accountability, I think.
I think it does help victims, some anyway, to think that even if their abuser/tormentor/murderer isn't held accountable to them, they will eventually have to face what's coming to them. The best part is that nobody guilty gets acquitted in the Heavenly Court, and we can trust that the justice will be fair. Hell, as I understand the Christian concept of it, is a place of revenge, where the guilty just HURT forever. Not so useful. Separation and accountability that I believe come after death with unresolved sin are "the only way to go". You get a life, you get a chance afterwards to make up for all the mistakes you made and then you get eternal bliss.
(As an aside, I haven't made up my mind about reincarnation yet. There is definitely room for it, though it isn't specified. If a life is cut short, maybe, or if a soul doesn't learn enough, maybe it gets sent back to learn more.