I too was really shocked by the awful aggression, but when you think about it, these girls are raised in homes where the males primary hobbies are beating each other up, and young people get together when a boy physically assualts grabs the girl. The rates of DV in the traveller community are very high.
These girls have little or no education, no freedom to make choices, and are basically domestic slaves from a young age. How on earth could these poor girls adapt to an adult working world?