I don't believe that ethnic origin is fate. Free will exists, and at the individual level, sometimes conscience and just plain sense overrride cultural indoctrination. But culture is very much part of an ethnocally defined group of people, in a statistical sense.
I do disagree and condemn the uneducated or downright racist attacks against Arab-Americans. However, they need to understand that all the people identified as being part of the attack have been Arabic, and it is hard to believe these scum did not associate with fellow Arabian people in the United States while they prepared their attack.
Fellow Arab-Americans, I say again I condemn the sporadic harrassment and vandalism purpetrated against you. (To date, I have not heard of any incidents of actual physical harm, but it may very well come.) However, you can do better than just complaining about harrassment; help us root these scum out. I don't ask you to be weasel snitches on your fellow citizens for vague feelings that something might be wrong, but if you know something, please come forward.