Times have changed. Please go to the NTSB website and review the Boeing submission to the report. Here is the address:
http://www.ntsb.gov/events/TWA800/exhibits/boeing_submission.pdf
After reading it, you will have a better understanding of the 747 fuel system. Let me give you a hint...it isn't at all like the F-86. No one is argueing that it is hard to ignite liquid Jet A. But as I've said previously, what explosively ignited was the vapor. Your anecdotes about burning fuel are all interesting, but moot.
"No I'm afraid you can't convince me that the center fuel tank exploded."
That's fine, but can you convince the engineers at Boeing that it didn't?
Look at Boeings technical response. They flat out state that none of the suggested causes for the fuel tank explosion were even plausible.
See Appendix C pages 33-46 of report. Design review and Tests