Oh brother. Another rapture by December thread. You realize that ‘rapture by December’ has been predicted countless times for 2000 years right?
I think I understand why this happens and why your observation has no convincing power to me. The mystery of iniquity is already at work, but though it always looks like evil is winning and the end is upon us, it never quite works out for them. The Holy Spirit "lets" or restrains until He is taken out of the way.
The calamities which overtake the world will not happen "because" of the Rapture of the church but simultaneously with it because the Spirit no longer restrains. The Horsemen of the apocalypse are kicking at the corral in a thousand places, when the HS allows it, one of those places will give way and then we will say, "I knew it!"
We remember Edgar Whisnant and his book "88 Reasons Why the Rapture will be in 1988". OK so he was wrong, but only for one reason: God did not allow it.