“In fact, this verse itself contradicts your interpretation, as it supplies a sign (the last trumpet) that accompanies the second coming, which we can place chronologically with other events from prophecies.”
It’s highly unlikely that Paul was referring here to the “last trumpet” of Revelation, since Revelation had not yet been written. The last trumpet here would be in respect to the end of the age.
“The tribulation means troubles, not wrath, so this verse does not state we will be spared from the tribulation.”
Wrath refers to the great tribulation period, see Revelation 6:16-17.
“The Bible never says Jesus will be unseen at the first resurrection, so there is no contradiction here.”
1 Thessalonians 5:2
“For yourselves know perfectly that the day of the Lord so cometh as a thief in the night”
“It’s highly unlikely that Paul was referring here to the “last trumpet” of Revelation, since Revelation had not yet been written.”
This might be a problem, if you didn’t believe that an Apostle like Paul had the gift of prophecy, and if you also didn’t believe that the entirety of Scripture is inspired by a divine author who knew the entire content before it was published. There are a great many similar references in Scripture that are only understandable by reference to later books. For example, many of the prophecies of the Messiah were not understood until centuries later, when Christ appeared.
“The last trumpet here would be in respect to the end of the age.”
There is no reference in the Bible to any last trumpet at “the end of the age”, that I know of. On the other hand, in the reference you cited, and the reference in Revelations to the final (seventh) trumpet, both correspond with descriptions of the second coming of Christ and the resurrection of the righteous. Unless you can show that Christ will return more than once, and that the righteous will be resurrected more than once, the only logical conclusion is that both of these descriptions are of the same trumpet.
“Wrath refers to the great tribulation period, see Revelation 6:16-17.”
Those verses describe an event during the great tribulation period that is called the “great day of wrath”. It’s an event referred to many times in the Bible, by other names as well, such as the “Day of the Lord”. This is not the same thing as the tribulation, it simply occurs during (at the end) of the tribulation period. To equate the entire tribulation with wrath in order to support your thesis is not supportable. As I said before on this thread, if the Great Tribulation was God’s wrath, it would be call the Great Wrath, not the Great Tribulation.
“1 Thessalonians 5:2
“For yourselves know perfectly that the day of the Lord so cometh as a thief in the night””
Yes, and, just as I said, this verse does not say that Jesus will be unseen at the first resurrection, does it? All one needs to do is look at the verse in context to see that your reading is flawed (1 Thes 5:1-4):
“1Now, brothers and sisters, about times and dates we do not need to write to you, 2for you know very well that the day of the Lord will come like a thief in the night. 3While people are saying, “Peace and safety,” destruction will come on them suddenly, as labor pains on a pregnant woman, and they will not escape.
4But you, brothers and sisters, are not in darkness so that this day should surprise you like a thief.”
The full context reveals that the comparison to the thief means only that the day of the Lord comes unexpectedly (for non-believers), not that the second coming and first resurrection are some sort of secret or concealed events. In fact, it refutes any notion that this event happens without people noticing, for how could they not notice destruction befalling them that they cannot escape?