Anyone who has been touched by God, knows that rapture and tribulation is a myth. By knowing God's infinite goodness and love you can know the higher truths that supersedes anything written in the bible or other holy books.
Many will not accept this beautiful and joyful message because this is too Good to be true. They cannot believe that God is this Good. Some prefer to see a God that is not this good.
Jesus revealed in many parables that God is too Good for many to accept. In the parable of the Prodigal son and in the workers in vineyard. Jesus showed that the well-behaved son was not happy with his father when his prodigal brother was restored to full dignity. The workers in the vineyard who got a day's wage as promised were not happy to hear that those who worked only a few hours also got a full day's wage.
Those who promote this rapture and tribulation are not happy to see others who they feel are not worthy as them to get away without God's punishment. They don't like a God that is not judgmental. So they promote the fear of God with rapture, tribulation, Judgement day and so forth.
Hopefully you can see a far more magnificent, wonderful and loving God. Fear not, because you are always dear to Him.