I had a difficult time with the brief high school teaching I experienced to try. My utmost respect and sympathies to all who teach for a living. There is a character you remind me of in a recent audio book, Stargirl, my 12 year old brought to our commute. The character is a neighborhood "teacher" where all the boys and girls go to hear his adventures and entertain their curiosities that he feeds.
As for our interest in Machiventa Melchizedek, I choose to believe some, but not all of what you shared. What your information validates, for me, is the claim that Machiventa was a divine being (as in a Son of God). After all your source credits Machiventa as "a gifted leader, magician, and spiritual giant." and "a person with magical supernatural powers."
On a side note, it's hard to keep a straight face with a name like Melik-Sadaksina thanks to a Saturday Night Live skit by Robert Deniro (my email response is enabled if you would like the media file for it :)
Here is why I do not think Machiventa was a Hindu from India (he may have been honored as a prince, though): India does not have a religion based on salvation through faith and faith alone. I have discerned any (loyal) divine being revealing God has always taught salvation through faith. If Melchizedek was from India, then salvation by faith may have been India's religion. But instead we have something much more ritualistic.
Here is a more detailed explanation of what I'm discussing: [www.grahamhancock.com] (SIDE NOTE: the description of the Aryan invasion also seems to validate the Aryan invasion historical explanations found in modern works like Underworld).
In a way you already discovered this development from your various lineage of city names related to the word Salem (another name Melchizedek went by was "Sage of Salem).
Salvation through faith was spread throughout the world through these missionaries of Melchizedek, but none of it fully developed into it's own religion. Instead it influenced the religions of the cultures and civilizations it spread to, thus the common denominator of its truth is found in all modern day religions, West and East.
Without the "emergency" mission (teachings) of Machiventa the world stage would have been ill-prepared for Jesus. Thus, we have a Melchizedek Son paving the way for a Michael Son. Both Sons taught salvation through faith alone.
Also, other sources such as the Dead Sea Scrolls and Enoch are validating the role and divinity of Machiventa.