Book critics or theatre critics can be derisively negative and gain delighted praise for the trenchant with of their review. But in criticisms of religion even clarity ceases to be a virtue and sounds like aggressive hostility. A politician may attack an opponent scathingly across the floor of the House and earn plaudits for his robust pugnacity. But let a soberly reasoning critic of religion employ what would in other contexts sound merely direct or forthright, and it will be described as a 'rant'.
Richard Dawkins (2008). “The God Delusion”, p.17, Houghton Mifflin Harcourt