Where does Earth Not a Globe say that all beliefs contrary to the Scriptures are necessarily wrong?
"Having detected the fundamental falsehoods of modern astronomy, and discovered that the earth is a plane, and motionless, and the only known material world, we are able to demonstrate the actual character of the universe. In doing this, we are enabled to prove that all
the so-called arguments with which so many scientific but irreligious men have assailed the Sacred Scriptures are absolutely false--not doubtful or less plausible, but unconditionally false; that they have no foundation except in fallacious astronomical and geological theories; and, therefore, must fall to the ground as valueless. They can no longer be wielded by irreverent smatterers as weapons against religion. If used at all, it can only be that their weakness and utter worthlessness will be exposed. Atheism and every other form of infidelity are thus rendered helpless. Their sting is cut away and their poison dissipated.
The irreligious philosopher can no longer obtrude his theories as things proved wherewith to test the teachings of Scripture. He must now himself be tested. He must be forced to demonstrate his premises, a thing which he has never yet attempted, and if he fails in this respect, his impious vanity, self-conceit, and utter disregard of truth and justice, will become so clearly apparent that
his presence in the ranks of science will no longer be tolerated. All theories must be put aside, and the question at issue decided by independent practical evidence. This has now been done. The process--the modus operandi and the conclusions derived therefrom have been given in the early sections of this work; and, as these conclusions are found to be entirely consistent with the teachings of Scripture, we are compelled, by the sheer weight of evidence, by the force of practical demonstration and logical requirement, to declare emphatically that
the Old and New Testaments of the Jewish and Christian Church are, in everything which appertains to the visible and material world,
strictly and literally true. If, after the severest criticism, and comparison with known causes of phenomena,
the Scriptures are thus found to be absolutely truthful in their literal expressions, it is simply just and wise that we take them as standards by which to test the truth or falsehood of all systems or teachings which may hereafter be presented to the world. Philosophy is no longer to be employed as a test of Scriptural truth, but the Scriptures ought and may with safety and satisfaction be applied as the test of all philosophy. They are not, however, to be used as a test of science and philosophy simply because they are thought or believed to be written or dictated by inspiration, but because their literal teachings in regard to natural phenomena are demonstrably true."
Why do you ask me to read the book for you, the one that is cited on the wiki and by all Flat Earthers?