Via European Institute of Protestant Studies:
“The temple in which Antichrist sits is representative of the Christian Church, a church however gone totally apostate. For the prophecy makes it clear that the apostasy precedes the revelation of the Man of Sin. He was indeed to be both the outcome and head of that great apostasy.
Antichrist then, according to this prophecy, would establish himself prominently in the professed Christian Church. This is exactly what the Popes have done. This fact disposes of the theory that the Antichrist will be some atheistical leader or superman politician who in a very brief but terrible career will desolate the world. No, he will work in, by and with the professed Christian Church, howbeit apostate.”