You wrote, "The SSDI records his death in Moroni, Comoros in November 1971." The SSDI does not list the place of death.
Looking at the SSDI on Ancestry.com, I see that his last residence is given as Moroni, Comoros. However, looking at the SSDI on familysearch.org, it gives his residence place as Europe.
Of course, this all only adds to the confusion over where he died.
Miriam Alexander Baker