Every eye will see him
Revelation 1:7 Look, he is coming with the clouds, and every eye will see him, even those who pierced him; and all the peoples of the earth will mourn because of him. So shall it be! Amen.
Even if I don't believe that Christians will go thru tribulation. I can understand why some feel that way. After all an account of the rapture should be after this verse to solve the issue. I would rather believe in rapture than not, but you expect the best and prepare for the worst.
Painting (Jesus breaking down wall of denomination and race)