Matthew 24:21-22 "For then shall be great tribulation, such as was not since the beginning of the world to this time; no nor ever shall be. And except those days should be shortened, there should no flesh be saved.
This is a biblical description that happens in the latter days. If you believe the Bible, you should know it will certainly happen because it is a direct warning from God. There are many signs appearing right now that should capture your serious attention, and let you know it is already happening in much of the world. Don't just read that message: study it until you believe it is from God. The Bible gives a clear message that anti-christ will come before the real Christ returns. He will cause this greatly feared tribulation. Many devout Christians believe the tribulation with such fear it causes them to have a false hope there will be a rapture for them to escape that awful tribulation. That is not found in any Bible and it will never happen. It is good logic to believe God's message in 1COR 15:50. Which reads, "Now this I say, brethren, that flesh and blood cannot enter the Kingdom of God: neither doth corruption inherit incorruption." The Bible also teaches our earthly bodies will see corruption and return to dust from whence they came. It is simple logic to know our earthly bodies of flesh and blood, that have not seen corruption cannot be with Jesus until they have experienced death that permits God to give us a spiritual body that will never see corruption. God promised that it will be a body that pleases Him. It is folly to think our earthly bodies could return to dust if they were up in the air; or even be with Jesus Who is in heaven at the right hand of God.
It was mentioned the anti-christ will come before Jesus returns to earth. That is a Biblical truth and more information is found about it in Rev 13:7-8 "And it was given unto him to make war with the saints, and to overcome them: and power was given him over all kindreds, and tongues and nations. And all that dwell upon the earth shall worship him, whose names are not written in the book of life of the lamb slain from the foundation of the world." That is another prophesy that should strike fear in every Christian's heart. But it would be ignorance to ask why God would permit that Our world is turning away from God and is becoming so wicked; He will have to punish it for our own good. It might turn some back to God's way of living and bring salvation of their souls. God sent His precious Son to be a pattern and example how He wants us to live this earthly life. If we can't see the world is turning from that way, we are walking in serious spiritual darkness and that will never please God.
Wish I had more space. Please read 2Corinthians 11:13-15. (How Satan comes) The anti-christ is Satan, and is a million times stronger than any man.