Bandwagon fallacy. Just because a number of people believe it doesn't make it true. Moreover, the statement is not even true, unless Catholics and Orthodx Christians don't count- they do not believe the concept of a pre-tribulational rapture is in the Bible either.
The argument is that the pre-tribulational rapture theory was invented by a girl in 19th century Scotland named Margaret MacDonald. This is patently false. For starters, 18 years prior to MacDonald, a Catholic Jesuit priest espoused his belief in the pre-trib rapture in his book The Coming of Messiah in Glory and Majesty.
Strawman fallacy. This is not the argument at all. The argument is that this was never a doctrine of any Christian church before MacDonald; that is no group of Christians ever accepted this, incorporated this into their written beliefs, and believed it as divinely inspired. No sifnificant number of Christians believed this before Margaret MacDonald spread this false doctrine to John Darby who spread it to a number of seminaries, which led to the result of it spreading like wildfire as a wholly new doctrine that was eventually believed by a significant number of Christians, despite never being accepted as such in the two thousand year history of the church.
Jesus and the apostles did.
I once got into it on Facebook with some who made similar arguments. You really can’t reason with someone like that.
John Darby!
Excellent points, thank you!