Amnesty International said the horrific attack on mosques in Christchurch, New Zealand, was a defining moment that required accountability of leaders who had encouraged or turned a blind eye to the scourge of Islamophobia around the world.

"This attack is a painful reminder of the consequences of leaving the policy of hatred and demonization unchecked," Amnesty said in a statement. She pointed out that the "policy of demonization" cost fifty lives.

Amnesty called on world leaders to counter the ideology of white supremacy. The organization described the ideology as hateful.

She was also shocked and saddened by the attack she described as lethal and racist towards women, children and men in New Zealand. "Today is the darkest day in New Zealand's history."

On Friday, Christchurch saw a terrorist attack with firearms targeting the mosques of Al Nour and Lynwood in an attack that left 50 dead and scores injured.