How did you get from "I find it repulsive" to "it's morally repulsive"? Last time I checked morality wasn't whatever you happen to agree with.
Incest isn't something that thwarts the desires of others, it only affects the desires of the persons involved, so it has no net negative value for society. I agree in that i'm personally repulsed by it, but that's not a good reason to start dictating to others about what they should do.
The risk to potential children is the only thing of any concern here, and provided that doesn't happen I have no good reason to object to it.
Incest isn't something that thwarts the desires of others, it only affects the desires of the persons involved, so it has no net negative value for society. I agree in that i'm personally repulsed by it, but that's not a good reason to start dictating to others about what they should do.
The risk to potential children is the only thing of any concern here, and provided that doesn't happen I have no good reason to object to it.
.