Is she ignorant or she thinks it is Mahathir that is ignorant?
Read what Nurul Izzah says here about Mahathir's use of the English idiom "better the devil you know (than the devil you don't)" which means "it is wiser to deal with someone familiar, though you may not like them, than to deal with someone who you do not know, who might be worse."
"I'm disappointed that Mahathir called Najib a devil...he is not," she told a press conference today.
Hahaha! Of course Najib is a devil in the eyes of Pakatan leaders and supporters as much as I and many others see the devil in her father Anwar Ibrahim and other Pakatan leaders.
Is she a product of our local education system that only study English as a subject and go no further?
Dear Nurul Izzah! It's metaphoric.