Great tribulation/persecution such as the world has ever seen and The pouring out of the vials/ Gods wrath, are two completely different things! False teachers have taught a lie. Even Kirk Cameron has admitted that the left behind series is incorrect and based on a theory that is no older than 250 years. The KJV has been in existence longer.

Know you Bible

Study to shew thyself approved, a workman need not be ashamed, rightly dividing the word of truth!