It seems to imply that is she were Jewish, then shouting “Jew” while beating her is somehow different.
Dennis Praeger explains that anti-semitism is so virulent throughout the Middle East, the epithet “Jew” is considered the most vile name a person can be called. He said “dog” is second.
Obviously some in the crowd decided to draw in more attackers by yelling “Jew” or maybe they view all white Westerners as “Jews”.
I could be wrong, but I don’t think they’re saying that the attack would have been okay if she had been a Jew. They’re just reporting a fact having to do with the story...she was called “Jew,” and it happens that she isn’t.