Welcome. It's always good to clarify things first.
Rapture is not a word translated from the Bible, but only an attempt at description for easy reference. Much the same as the Trinity, which is not translatable from Scripture, but is used for the Godhead of Father, Son, and Holy Ghost. Trinity wasn't coined until about the 3rd century.
As a matter of grammar, rapture is a passion word, that is applied to the church being caught up into the air to meet the Lord. In itself it's harmless, and I use it here simply to keep consistency in the thread about the rapture.
One point. The modern misconception about the rapture is the sudden 'disappearance' of the church from the earth. Not true.
The 'process' of the rapture is twofold: First the resurrection from the grave of all the dead saints in Christ. Along with all the saints remaining alive being changed immortal. That is the blessed event, that is in a moment and twinkling of the eye.
Secondly, is all the resurrected and changed saints caught away together into the air. That blessed event is not iinstantaneously, but rather an ascension like that of the risen Jesus Christ in Acts 1, and the resurrected two witnesses in Rev 11. That will be in sight of all people on earth.
The passionate 'rapture' therefore includes both the instant blessed first resurrection of the church, and also their blessed ascent into the air, for all eyes to see. (The third blessed part is the angels of God gathering all the risen saints together, to meet the Lord where He is in the air.)
This is not true, since end times 'eschatology' is the apostles' teaching of the last days in Scripture. They consistently confirmed they were in the last days:
Act 2:17
And it shall come to pass in the last days, saith God, I will pour out of my Spirit upon all flesh: and your sons and your daughters shall prophesy, and your young men shall see visions, and your old men shall dream dreams:
Heb 1:1
God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets, Hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also he made the worlds;
1Jo 2:18
Little children, it is the last time: and as ye have heard that antichrist shall come, even now are there many antichrists; whereby we know that it is the last time.
Nowhere, does any apostle write that these last days have ended. And so, we see that we have all been in the last days, since the beginning of Jesus' own resurrection and church on earth.
The question therefore is, exactly what are the last days? All we know from Scripture is that the people of God are blessed with gifts of the Holy Ghost, pastors and teachers are sent to edify the saints, and are accompanied with false prophets, antichrists, scoffers, and perilous times.
Pretty much a renewed ongoing cycle from generation to generation, wherever the gospel is preached...
We can be assured of one thing, that the evil parts of these last days will end, when the Lord comes again to resurrect and catch away, aka rapture, His church unto Himself, and pour righteous wrath upon the inhabitants left on earth.
Once again, your conflating two different arguments here. Though 'rapture' is only a coined word for last days theology, the doctrine of the last days is by the apostles beginning in their own days...
I'm not altogether clear about dispensationalism. I believe it has to do with 'ways' of God dealing with man through history. For me, that's more of an observational teaching, based upon Bible history. Not necessarily teaching of Scripture.
Fundamentalism for me, is simply taking the Scriptures literal wherever possible, and living accordingly by faith in Jesus.
I believe this is where the false notion of the raptured 'disappearing' church was popularized. I haven't read it, nor seen the movies and shows, but that was a main point.