The Antichrist was Ceaser Nero. The Apocalypse never happened. Jesus didn't return with power while his generation still lived. Christianity is a failed religion.
Jesus taught that He was coming back within forty years and failed to keep His promise. That, they said, is one of the reasons why we can’t believe that the Bible is the inspired Word of God.
Revelation 1:7 it says “Look, he is coming with the clouds, and every eye will see him, even those who pierced him; and all peoples on earth will mourn because of him. So shall it be! Amen.”
Why expect those who pierced him to witness his return, unless it was supposed to occur within their lifetimes?
The typical answer is that they will be resurrected specifically to witness the second coming just so that verse won't be wrong, which must seem like convenient stretch, even to apologists.
Over and over, worded in many different ways, it is stressed to early Christians that the time is near (Rev. 1:3) so they should not to make long term plans (like marriage: 1 Cor. 7:29–31), not to go on living in the world as if it will still be here for the rest of their lives, and to look for specific signs that they could expect to see.