The rapture is not a get out of suffering ticket. As you pointed out Christians have suffered in various ways and places throughout history. Instead, the rapture is Jesus calling His Bride, the church, home to heaven before judgement comes upon the earth. What reason would God have to pour out judgement on the Bride of Christ, those who have already repented and placed their faith in Christ Jesus as their Savior? None, so the church will be removed before the Antichrist and judgement of Revelation take place. That’s what I see in the scriptures.
Now this I say, brethren, that flesh and blood cannot inherit the kingdom of God; nor does corruption inherit incorruption. Behold, I tell you a mystery: We shall not all sleep, but we shall all be changed— in a moment, in the twinkling of an eye, at the last trumpet. For the trumpet will sound, and the dead will be raised incorruptible, and we shall be changed. 1 Corinthians 15:50-52