If you believe the NTSB report concerning TWA 800 is a government lie produced to cover up a crime, you are by definition a conspiracy theorist. You may be right (obviously I don't believe you are), but you are a conspiracy theorist nonetheless.
"My point it that aircraft fuel vapor is not explosive under normal operating conditions of commericial aircraft."
I think it would be more accurate to say it is always explosive, it just doesn't explode under normal operating conditions due to carefully engineered systems designed to isolate it from sources of ignition. But obviously, based on a long history of fuel vapor explosions, those systems sometimes fail.
"There's no evidence that TWA 800 was struck by lightning or that any kind of equipment failure occurred on the flight that night."
It is true the TWA 800 was not struck by lightening. However, it is untrue to say there was no equipment failure on the flight that night. The fuel quantity indicator system was experiencing a series of electrical surges that was causing inaccurate fuel readings in the cockpit. One of the last comments recorded on the cockpit voice recorder (about one minute before the aircraft explodes) is from Captain. He says, "Look at that crazy fuel flow indicator on number four." It was short circuiting in that system that is attributed to producing the spark inducing excess voltage in the center wing tank.
"But there's a lot of evidence that TWA 800 was struck by a missile."
The irony of that statement is there is NO evidence TWA 800 was struck by a missile. ALPA, Boeing, TWA and the NTSB all agree on that point. You listen to paid conspiracy theorists like Cashill for your information. I'll stick with the true experts.
From the Report, page 129 (thanks for the link above ) ---
"Review of the data obtained from the emulation flight test revealed that the CWT vapor samples had fuel/air mass ratios247 of 0.034, 0.046, and 0.054 on the ground during taxi and as the airplane climbed through about 10,000 and 14,000 feet msl (see table 7). According to scientific literature248 and tests conducted by experts at the California Institute of Technology (CIT), the lower flammability limit (LFL) of Jet A fuel is at fuel/air mass ratio of 0.032 to 0.038.249. "[note - 249 = reference number]
Have you read any of the other threads on TWA 800? I doubt it, and you're probably not going to read them because you're rigedly locked into your opinion about TWA 800. There's all kinds of evidence that TWA 800 was struck by a missile, but you just choose to ignore that evidence and make bald assertions that "there is NO evidence TWA 800 was struck by a missile." You can make all the assertions you want and ignore all the evidence you want to ignore, but that doesn't change the facts. Like I said, you need to start by reading some of the threads on TWA 800 here at FR. Most of those threads are not written by crackpots. They're written by smart, well-informed people. Right now you apparently know very little about what actually happened to TWA 800 and yet you're rigidly locked into your position. Go read the other side of the story and then see if you can move an inch off of your position.