“It’s not biblical, it was not thought of in the early Church...” LOL, tell that to Jesus, Paul, and John. [ See 1 Thess 4:13-18; 1 Cor 15:51-55; John 14:1-3 ]
They're not talking about a secret rapture where the church is taken away by a returning Christ only to come back later. They're describing the 2nd coming of Christ. That's the difference.
The notion that Christ returns in a secret rapture to take away the church is an invented fairy tale. When Christ returns and the events in scripture happen everyone will know it because THIS is the event that Christ is returning as king.