It’s not a “secret” rapture. It’s plainly stated in scripture several times.
In the New Testament it is called the deception, in the Old Testament it is called 'fly to save souls'. God knew way back in Ezekiel's days what His darlings were going to devise. Ezekiel 13:16-23 describes in full detail what God thinks of the rapture doctrine. He says He is going to deliver His people from the doctrine of 'flying to save souls' and '....they shall know that I am the LORD''"
So what did the busy fingers do? Why they changed the WORD of God in their new translations so it appears as if a 'bird' is the subject/object. People make choices and unfortunately the majority refuse to abide by the very choices they make.