Famed atheist and biologist Richard Dawkins is known for taking a combative approach when it comes to his attempts to debunk — and dismiss — faith and religion. While his malicious comments are nothing new, the statements he‘s been making about Republican presidential candidate Mitt Romney’s Mormon faith are noteworthy. In his most recent Twitter rant, Dawkins alleged that Romney’s beliefs should disqualify him for the U.S. presidency.

The atheist leader claims that Romney is “a massively gullible fool” for being a member of The Church of Jesus Christ of Latter-Day Saints.

“No matter how much you agree with Romney’s economic policy, can you really vote for such a massively gullible fool? He is a Mormon Bishop!,” Dawkins Tweeted on Sunday.