This movie came from a book entitled ROBINSON CRUSOE, USN. It was published by the Pacific Research Institute in Barrigada, Guam, and can be found at most bookstores on the island. You can also find it on the Amazon website as a used book. I found my copy when I lived on the island at a used bookstore.
The book was initially written by George Tweed, the sailor whose story it is, but later versions included his death. It's not a great literary classic by any stretch of the imagination but it tells about thing the reader can't get any other way.
No sane person is a pacifist if someone (or something) he loves is threatened.