Seems like a pretty interesting topic to have a discussion going through. I had a interest/passion in these sorts of myths/some people call them science/mysteries happening all over the world right from my childhood and based on that I have been grasping knowledge on what they are and why people are really afraid of that actually.
Bermuda Triangle from a point of MythsNot many people believe in myths actually, but they are quite interesting to read and since most of these myths are pressurizing us to believe some sort of supernatural powers exist around us, we tend to believe so.
Bermuda - Atlantis TheoryBased on one such ancient facts, Bermuda Triangle seems to contain the "Long Lost City of Atlantis" (Not the one which comes in Aquaman movie) . Some of them could be well aware of the Atlantis city which was first mentioned in Plato's works. Though I have never read his works, but people tend to believe these cities consisted of many powerful instruments or magnetic radiations which tend to attract the ships and planes flying over them. These were probably proven true that there would have been an ancient city and that the sculptures found underwater near the region of Bermuda Triangle seen to have ancient scriptings written on them.
The common Alien TheoryWhen something strange happens in any part of the world, there is a common misconception or a famous theory that they are done by aliens which come from a parallel universe. If we were to believe the parallel universe concept, then aliens should be existing. Hence some believe that the Bermuda Triangle serves as a pathway to an alien world which might connect two worlds.
Bermuda Triangle from a point of ScienceIf myths proven to be wrong or never to be believed, we commonly tend to move to the idea of Science.
it all started by a novel writer,
Not exactly true, but the concept of a Triangular pattern in North Atlantic Ocean consuming or emitting strange energy came from Christopher Columbus instead and not from random unnamed authors as you have mentioned. There are no real writings of Columbus in the native Spanish/Italian or to say they have been lost, but his voyages and his achievements have been recorded by Bartolome de las Casas in his books. Going by that, Columbus and his man have seen strange movements of Compass and they were not really pointing out to the correct direction. This incident took place probably in the region of now called Bermuda Triangle. He has even said that they have seen strange lights in the seas and has also seen a light falling from the sky. Weather this could be true or not, but Columbus writings were an important part in the beginnings of mysteries surrounding the triangle.
The Methane Gas TheorySome scientists believe that the area of Bermuda Triangle encompasses insane amount of Methane Gasses which are present well below the seafloor. This were at times, proven to be correct since scientists has encountered Methane Gas in a frozen state in the area surrounding the triangle. When such gasses were released they could eject huge heat which can make the Flights passing above them to catch fire. Also, the density of water can reduce causing the ships to sink in the area.
The Hexagon Cloud TheoryAnother set of scientists who disagree with the Methane Gas Theory, believe that there exists Hexagon Shaped Clouds since the Satellite Photos taken above the Bermuda Triangle proves that. These Hexagon Clouds can create high pressures in the clouds which in turn destroys the flights passing through them. Such Air Pressures over the days can cause huge winds and waves which may destroy the ship.
I have just given a basic understanding of what were the Myths and Science which surrounds the Bermuda Triangle. I firmly believe these Ancient Theories doesn't make much sense, but the Methane Gas and formation of Hexagonal Clouds could make sense actually.