Delusions:

Isaiah 66:4  I also will choose their delusions, and will bring their fears upon them; because when I called, no one answered; when I spoke, they did not hear: but they did evil before My eyes, and chose what displeased Me.  Ezekiel 20:25

With the Rapture Cult, the initial error is that of separating Israel and the Church, so they could still look for salvation to come to ethnic Israel, as a major tenet of their doctrine: Israel on earth, the Church in heaven.   The pre-Trib rapture teaches removal to ensure survival from tribulation, but salvation has always been stated to redeem us from our fallen sinful state,  in our earthly situation.   

 Acts 20:21 I know that when I am gone, savage wolves will come in among you and will not spare the flock. 2 Peter 2:1-3, 2 Timothy 4:3-4

The rapture idea is that God will “save us” from that which must occur – thus equalling this supposed removal with salvation. After so many Christians saw the inadequacy and misappropriation of the verses used to promote Pre-Trib, the Post-Trib alternative was then built around surviving the tribulation – thus sustaining the illusion that survival is somehow related to salvation. The “delusion” the LORD chose, is the strong delusion referenced in the New Testament:    2 Thessalonians 2:11  And for this reason God shall send them strong delusion, that they should believe a lie.

This “delusion” has people looking forward to the 2nd Coming (in the so called rapture, Pre, Mid, or Post) believing in an evacuation. The reality is, we experience  His glorious salvation when we enter in to the blessed assurance that Christ’s Death means the penalty for our sin has been paid because of His sacrifice on the cross. Our salvation was assured at the first coming, not the second. Ever since then, believers must trust in Jesus for their salvation and for their protection during the testing times to come.  Isaiah 43:2, Psalms 31:23-24

And if the Lord does not save them, as has happened to the millions of martyrs in the last 2 centuries, then we must die trusting in His promise of resurrection. Revelation 12:11 Our souls will be kept under the heavenly Altar, Revelation 6:9-11, and Jesus will bring them with Him at His Return, then bring us to life again, to reign with Him for 1000 years. Revelation 20:4