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!
Except those days be shortened, shall no flesh be saved. The majority will be muttered by the antichrist. Then I saw a great multitude under the alter, and they said how long Lord holy and true till you avenge them who have killed us. And they were told to wait until the rest be killed. Not all will be beheaded but most will. Some will be spared. The antichrist will make war on the saints and there will be a great falling away. Aka mass death of believers.