Why do Christians always say the Bible is all "metaphorical"?

Generalizations betray credibility and lead to false conclusions -- not all say this, in fact some go the other extreme and believe it is only to be taken literally...then there are any number of people in the sliding scale in between. Don't get caught up in the debate. The truth is that Scriptures interpret other Scriptures and where there is confusion or assumed contradiction, the interpretation is incorrect. Problem is lazy people don't study and agenda driven twist...read for yourself or risk being misled.