An Amanah leader has hit back at Prime Minister Najib Razak for blaming the notorious crackdown Operation Lalang on then premier Dr Mahathir Mohamad, asking why he hadn't protested it at the time.

“What is clear is, everyone knows (Najib) has never said he didn't agree (with the crackdown). He has never protested, and never even threatened to quit.

“Therefore it can be taken that he fully agreed with Operation Lalang,” said Amanah's Sepang MP Hanipa Maidin in a statement today.