'The God Delusion' author and world-renowned atheist Richard Dawkin's recent comments regarding the terrorist attack in France have created some controversy for the evolutionary biologist.

The former Oxford Professor has never been shy when it comes to expressing his views regarding multiple topics especially the issue of religion.

"They shouted 'We have avenged the Prophet Muhammad'," wrote Dawkins on his Twitter page on January 7.

"Some useful idiot will claim it had nothing to do with religion. No, all religions are NOT equally violent. Some have never been violent, some gave it up centuries ago. One religion conspicuously didn't."

The famed Charlie Hebdo weekly magazine was attacked by an Islamic terrorist group on January 7 2015, where 12 people were brutally killed that day in Paris, France.

"We have avenged Prophet Muhammad. We have killed Charlie Hebdo. The gunmen also shouted 'Allahu akbar', or 'God is great'," said an unnamed eyewitness who was quoted by Paris prosecutor François Molins in a Wall Street Report.

The suspects are believed to be 32-year-old Chérif Kouachi, his 34-year-old brother Said Kouachi and at least another man. The terrorists committed the heinous crimes with AK-47 rifles after the news magazine previously published satirical cartoons that lampooned everything including the religion of Islam and its Prophet Muhammad in the past.

Like Charlie Hebdo, Dawkins has revealed his viewpoints on the Islamic religion in several occasions on social media in the past.

"All the world's Muslims have fewer Nobel Prizes than Trinity College, Cambridge. They did great things in the Middle Ages, though," wrote Dawkins via Twitter on August 8, 2013.

Last year, the 73-year-old Nairobi, Kenya native said he believes "moderate Christians and Muslims" for not questioning their respective faith has led to religious extremism in the world.

"It's very important that we should not demonize ordinary, law-abiding, very decent Muslims which of course is the vast majority in this country," said Dawkins, according to a report by the Telegraph.

"Let's leave out Muslims specifically, but the difference between moderate religious people and extremist fundamentalists is that although of course it's only a tiny minority of any sect which is ever going to get violent or horrible, there is a sense in which the moderate, nice religious people - nice Christians, nice Muslims - make the world safe for extremists."