The pre-Trib Rapture is the event in which Christ returns to the earth but stays in the air and on a cloud. He will return to remove all His saints/overcomers from the earth. The Second Coming (the Second Advent) is the event in which Christ returns to the earth (with the clouds – with His Host of raptured saints/the armies of Heaven). He will return to bring the Tribulation Period to an end by defeating the Antichrist and his evil world empire in the Battle of Armageddon.
God’s powerful delusion will support so many people’s current beliefs in aliens and alien abductions. Apparently, God will strengthen their ungodly beliefs with His alien-like Divine Judgments (His Wrath) – the LOCUSTS and the HORSES and their RIDERS – that He pours out on the earth during the Tribulation Period.