Hayat,
I feel your frustrations I too know of the incident you discussed. Behaviours such as that is inexcusable, thank god he was given a jail sentence. It's unfortunate that issues such as this arise all the time, think about all the people who send family members overseas when they cause a crime like rape, assault and even murder.
I guess I should have mentioned that the ayah I used "I have made you in to nations and tribes so that you may know one another" ends with Allah saying that the best among you are the most righteous.
We need to keep in mind that our deen stresses the importance of knowing who you are and where you are from, but that you need to be just in all your dealings with your fellow mankind and remain righteous.
Allah knows his servants very well, enough to make a Heaven and a Hell. Take comfort in knowing every man will have their day.
Farancab,
LoL who you calling brother