Richard Dawkins has given a withering putdown to a cheesy video uploaded by a Christian evangelist.

Dawkins rejected Joshua Feuerstein's big claim that a viral video proved the existence of God, calling it 'weak'.

Christian evangelist Feuerstein claimed that the film dismantled all of the work done by philosophers such as Dawkins in 60 seconds.

"If this is the best the faith-heads can do by way of 'demolishing atheism', I hope you will give it maximum publicity in order to demonstrate how pathetic the 'argument' is. It’s so weak, no reply is needed," Dawkins told the Huffington Post.

"To anyone of any intelligence at all, it replies to itself."

Feuerstein, 33, is a former TV and radio evangelist, who has taken to social media to broadcast "his personal story of redemption and the hope of how Jesus Christ can heal a hurting heart!"

He has over 1,000,000 likes on Facebook and frequently updates his page with motivational videos about Christianity.