She's not an Arab at all.
Why would she be called an Arab?
Her family comes from Bengal in India and in the UK, Indians, Pakistanis and Bangladeshis are called "Asians" - which makes sense, since all those countries are in Asia.
Whether the press used "Asian" as a euphemism to avoid mentioning the Islamic faith may be a small point, but the bigger point is this attack happened in May and is only being reported in the briefest way possible on July 1. They didn't even report whether or not she was severely injured. This being a very prominent movie series, it seems that one of the young actresses being attacked by family members should be a big story, and I will repeat, if the family had been Catholic or Baptist, there would have been tub thumping for weeks, and it would have led all the major news networks broadcasts. The courthouse would have been inundated with reporters. Course, what do I know. The father of the young girl who played in Slumdog Millionaire tried to sell her, but that didn't seem to be big news either.