Why are the majority of gang rapes committed by black men?

I would say that its because most of the time it is black men that create and involve themselves with gangs. Once in a gang they are prone to do acts of violence. So if it was that mostly white men joined gangs then they would be the ones to rape and do violence. And black men may rape in gangs but alot of child molestors out there are whites or hispanics and they go solo. Im hispanic btw so im not being racist. Also rape can occur within a relationship so it doesnt mean that white men dont rape. White men do rape but more secretly.