And its the only place that has actual writing system. It also matches many descriptions in the Book of Mormon concerning tropics as opposed to the bitter cold winters in Buffalo New York. And all the topography features of what and where is up and down are matched, as Sorenson has shown in numerous publications. And this is where at least 3 Book of Mormon names are bonafide confirmed, among many other things.
As dude already pointed out, the writing system is immaterial, because it is unrelated to any Old World script whatsoever. Yes, I know there are some fringers like Barry Fell who claim otherwise, but mainstream scholars have discredited Fell’s claims.
All of the topographical features do not match. The entire theory depends upon rotating the directional axis, for one thing. Secondly, the “narrow neck” is a horrible match with the Isthmus of Tehuantepec. I did some research on this myself before finding this page that already demonstrates its problems.
Isthmus of Tehuantepec 1. It is much too wide. It is 130 miles across and would not be considered narrow by the average person. It could not be crossed in 1 1/2 days by the average person, but would take 7 days at 20 miles per day. Alma 22:32 and Hel. 4:7. During the California gold rush of 1849 those who did not cross continental North America to get to the gold fields used three other routes: 1) sailing around the tip of South America and thence up to California, 2) Crossing the Isthmus of Panama, and 3) Crossing the Isthmus of Tehuantepec. The Panama route was the preferred one, the South American route the second, and the Isthmus of Tehuantepec least preferred because it was the most difficult and dangerous. To get some idea of the width of the Istmus of Tehuantepec let us make some comparisons. It is wider than the state of Florida. It is almost as wide as the narrowest part of California. It's width is about the same as the distance from Salt Lake City, Utah to Vernal, Utah, or to Fillmore, Utah. Would you consider these distances to be "narrow"? Some researchers have suggested that Tehuantepec was narrower in Book of Mormon times, and thus could more easily qualify as the narrow neck. However archeological research has shown that ancient sites along the Gulf coast date back to the Nephite era, so that argument cannot be correct otherwise they would have been underwater. Others have suggested that the "narrow neck" is actually a narrow strip of land along the Pacific coast of Tehuantepec; however, this ignores the criteria set forth in the Book of Mormon.
What 3 Book of Mormon names are “bonafide confirmed”? I’m familiar with Bountiful. Of course, that’s the wrong place and wrong time, but it probably is the best “evidence” Book of Mormon apologists have ever found, which is pretty sad.
Sorenson’s “up and down” research was quite convoluted, and entirely dependent on his subjective interpretation of the terms.