A) Upload fabricated news in obscure books, blogs and Wiki.
B) Discuss the fabricated news in SM and repeat it.
C) Get it mainstream.
I did a search on the Newspapers from 1963. As the Answer in Quora mentions, "No newspapers of 1963 have such news. Even pro RSS dailies have no such news."
Link : quora.com/Did-Nehru-real…
The first entry was added in 2009.