Yes, that is a problem.
However talking about the texts of ancient india, on thing always struck me as odd:
Oppeheimer quoted the Mahabharata whilst witnessing the first succesful nuclear weapon test. And if you start reading up on Oppenheimer you realize this man was a follower of hindu faith. Of course the texts instantly reminded him of the ancient epics. And if you think about it "unleashing the power of the cosmos" is a damm good description of nuclear fission. And then you start reading about an iron thunderbolt dropped by a vimana and you can't help yourself thinking of a plane dropping a bomb or firing a missile. And when you read about people loosing their hair and nails, food and water becoming all of a sudden "poisonous" you can't help to be reminded of radiation sickness. Its interesting when you think about it... was he really inventing or rediscovering?
It gets even more weird when you take a look at the swastica in the same concept. Because that symbol is also straight from the Samarangana Sutradhara. Its a sign of good fortune from a text explaining some kind of technology. And when you look at the WW2 development... it seems they were using the text as a blueprint. Not just Oppenheimer of course, also Von Braun and many others.
Of course one might object that the mantra-magic is quite different from the kind of technology we use today. As an example they propose a mercury engine. We don't build that kind of engine, however we build mercury gyroscopes for navigation equipment. This technology described works, its just our applications are slightly different.
And if you look at some of the technology descibed there its even more advanced than what we use today. I am a bit amateurishly interested in military hardware myself and when i draw comparisions...
Lets take the sound seeking missile as example. A missile with such a guidiance system, and we could build it - we just don't because we went a different route with radar and optics (image recognition and laser guidiance), would totally defeat any countermesures employed today. No chaff would work on it, no flare and no radar absorbing/deflecting frame would safe you from it.
Or the invisbility cloaks are technology we are developing right now (with microcameras, computers and surfaces wich show the image on the other side of the surface).http://www.youtube.com/watch?v=PD83dqSf ... re=related
This stuff is practicable.
Its too precise to be "just" religious guesswork in my opinion. There are far to many coincidences.