Christians Will Go Through the Tribulation

Most Christians believe in a pre-tribulational rapture. McKeever along with contemporary Dave McPherson (Author of The Incredible Cover-Up, Omega Publishing 1980) believed the true Church of the Living God would be persecuted by the False "one-World" church of the Anti-Christ. He also knew that up until around 1830, no such doctrine had ever been taught. In Matthew 24:22 Jesus tells his disciples "Except those days should be shortened, there should no flesh be saved; but for the elect's sake those days shall be shortened". Argument is made that Jesus was speaking to the Jews only, but Mark 13: 37, Jesus warns "what I say unto you I say unto ALL, Watch" (emphasis mine). Matt 24: 29 reads "immediately AFTER the tribulation of those days shall the sun be darkened, and the moon shall not give her light". Compare this verse to Rev 6:12-14, and we find this occurs following the opening of five prior seals. In Rev 6:9-11, John records the fifth seal opening which reveals the "souls of them that were slain for the word of God, and for the testimony which they held". If the Church is raptured before the tribulation begins, which saints are martyred and why did John write in Rev 12:17 that the dragon (Satan) was wroth and went to make war with the remnant which keep the commandments of God, and have the testimony of Jesus Christ?