“We do believe that there was a familial dispute that has taken place between her ex-husband and her ex-husband’s family,” some of whom are Jewish, police said.

This is related to a fight with her ex-husband rather than some deeply held antisemitic belief. Probably trying to do the most harmful things possible to get back at them, which explains bringing their child along with her.

People like this are pro-palestinian just because they’re against Israel. If hypotetically it was arabs vs arabs they wouldn’t care less.