Guess ..without google...who said it

"Sometimes, negative preaching can get in the way of the message. The tribalism that leads to ranting preachers or reactionary people does not edify the church, the preacher or the hearer. More significantly, negative preaching can let the misunderstanding of the passage set the agenda, so that more time and emotional energy is expended on what the passage is not saying than what it is saying. So the main focus, let alone the subtleties of the passage, is lost in the mire of correcting error."