We've never made that claim. Of course there will be tribulation, persecution and trouble in general for us. What we won't be a part of is Gods wrath which occurs during the great tribulation. The tribulation is an event, not what occurs in the daily lives of believers. There are some good books on the subject.These things I have spoken unto you, that in me ye might have peace. In the world ye shall have tribulation: but be of good cheer; I have overcome the world. John 16:33
So why do Protestants today, from the most pampered and self indulgent generation in history, believe that they don't have to face tribulation when all other generations did?