This is referring to the request for 10 more examples of why incest is wrong and what it can cause.
1. Indirect psychological problems
2. Physical abnormalities.
3. Inheritance issues
4. Other legal issues.
5. Social decay
6. Bullying
7. Embarrassment for a region/nation.
8. Sexual abuse issues
9. Most major religions condemn it.
10. It is not real love.
Get a divorce quick!
Okay, so i'm gonna answer these in the same way you listed them. Numerically. Each number will address the same number as above.
1. As i have specified, consenting incestuous sex between two adults is not a problem, even if it causes psychological issues, because, since you seem to value the law so much, it is their right to do things, even though they may cause them psychological harm.
2. It has been said repeatedly in this thread that physical abnormalities aren't necessarily automatically gonna happen first generation. Even if it did, wouldn't it be their right, as consenting adults, to have these children? Also, again, this can be avoided via contraception, birth control, sterility, and even going so far as to be "fixed" so you can't have children at all. This seems to be your major sticking point, and it simply isn't a valid argument, for so many reasons.
3. Inheritance issues? What issues would that involve? No one has said anything about brothers and sisters marrying. That isn't even part of the discussion. And if it isn't part of the discussion, then it isn't a valid argument, is it? But let's assume they could get married, and their parents died and left something to them. What of it? Legally, whoever it was left to would get it. And if they broke up, the law would deal with them as they would deal with any divorce. Not an issue.
4. Other legal issues. This shouldn't be on your list, because it doesn't say anything. I have to assume a lot to even really begin to get any meaning from it. I'll try anyway though. Let's simply say that we aren't talking about incest being illegal. Let's ignore marriage, because i imagine that marriage between brothers and sisters, fathers and daughters, etc. and so forth, if legal, would be treated the same as a marriage between unrelated people. I don't see any reason why it wouldn't be. So, those out of the way, i can't even think of what legal issues you could come up with?
5. Ummm.... social decay is a huge assumption, with nothing to back it up, whatsoever. It's essentially just an opinion you've thrown onto your list, and as such, can be realistically ignored. But i won't ignore it, that would be to easy. For one, the definition of social decay in and of itself would be in debate. Some might say we are in a social decay now, some would not. So, if we can't even agree there, how could you possibly use this as an argument? Ehh... there's so many things i could say, that would essentially sum up to, "people won't agree on what social decay is" so i really can't argue with this. This is, as i said, merely your opinion.
6. I don't see how bullying would be an issue. I've stated that incestuous sex between two consensual adults is okay, not children. And how often do you actually have to deal with bullying once you are an adult? Even if it does happen, here in america, we have several laws that defend us against this issue.
7. Embarrassment for a nation/region is, like 5, simply an opinion, and as such, can not be used as a factual reason against incest. I would not be embarrassed at all if incest was legalized. To me, this would be an example of our country moving forward, and proving that it isn't beholden to outdated laws.
8. This can be ignored, because i have said, as others have said, that if any kind of sexual abuse comes into the picture, it is wrong because of the abuse, and not cause of the incest. And there is no reason to believe that incest requires this, at all. Incest could occur between to consenting adults, simply as a way to achieve pleasure, and nothing more. No sexual abuse there, hmmm?
9. These are outdated. Religions rarely change in any significant way. Society, however, does. Also, just because a religion condemns something, doesn't make it wrong. The muslim religion condemns you, simply for not believing in allah. Does that make your existence wrong? This is also an argument from authority/majority, and as such is a fallacy.
10. Who said love even had to enter it? Incest could come about simply cause two siblings want to have pleasure, and for whatever reason, choose their sibling as someone who can give it to them. Also, this is an opinion, you can't back this up. For one, their is that sibling love you've mentioned, and doesn't "real" love, come from physical attraction? So, if two siblings are physically attracted, and fall in love, how is that any different than if i fell in love with someone who isn't related?
Kay, so i just addressed those issues. Feel free to challenge me on my rebuttals, and then hopefully you'll tell me any other ones i've missed, and then we can go from there.