Jews: Why the animosity towards them?

[Ramses II CP]

But there ARE genetic groups of people. That is how we are able to determine race by DNA. There is nothing wrong with observing or taking pride in this.
If people refused to consider the concept of race, image how the medical breakthroughs on sicklecell would have been hindered.
People DO fall into biological groups, and it is correct for people to "group" them in their mind (because they are genetically grouped!!).

I can "group" every blonde I see and put them into the "blonde schema" (It is a phsycology term for how we group things), it simply makes it easier for my brain to recognize their hair colour when I see one. No harm there.
If on the other hand I associate ludeness or some other negative stimulus (Which many people do believe it or not) with the "blonde schema", then I have done wrong and am not judging them individually.
Another example, there is not wrong with observing that someone is in the "female schema" (if we didn't group males and females we would have no medical knowledge to speak of), I have done her no wrong. If I associate bad driving with the female schema, then I am not judging that woman as an individual and there I have done the wrong. Understand? It is associating negative things with the schema that can be bad, not "grouping people".

As far as the Jews go, I have already said that I do not believe there to be one definate and singular line from which they desended, but they and others believe that there is, and so it is important to the discussion.

Ahh, now we're getting somewhere, there are genetic groups of people, but to call them races is, I believe, misleading and incorrect. You didn't address the problem of how to determine the depth to which you must track to disover the magical 'this is a race, but one more or less is not,' point. Sickle cell research actually supports my point, because it is not present in any one race.

That's right, what you may have commonly read about sickle cell is wildly inaccurate. The rate of occurence for the sickle cell gene is equally present in large populations in Greece, Arabia, Africa, and India in people of extremely different phenotypes, while in southern Africa the people living there, who are by every visible standard almost identical to those of central Africa, do not carry the sickle cell gene (Because they had minimal malaria exposure through their history). There is no way you could, by skin color, hair color, facial features, or any of the other common 'race' descriptors determine if someone was a sickle cell carrier.

The only way to describe them is as having a common ancestor, in the distant past, who developed a persistent trait. Calling such a group a 'race' would be misleading in the extreme, and wouldn't, IMHO, match any of the common definitions of that word.