The British "divide and conquer" didn't work so well in the so-called upper castes. Though divided by language and perhaps some religious rituals, Brahmins from all of South India viewed themselves as having the same ethnic origin (Kashmir or some other part of Northern India who took refuge in the south from the Islamic invaders.) I believe that all temple rites were conducted in Sanskrit.
Malayalee Namboothiri brahmins have very, very, different rituals, customs and even social structure (with a matrilinieal culture and a unique formal intermarriage system with the Nair warrior caste) from even the Tamil Brahmins (who are probably closest culturally to the Malayalees).
Also the Brahmins are a
tiny minority (only around 1.4% of the current population)- they're going to be an influential voice in the state's politics but by no means the dominant one. You're totally ignoring the large, educated, politically aware lower middle class (which extended across all castes) that IOTL dominated Kerala state politics.
Hindu Kings had absolutely no problem with Jews or Christians.
I never said they did. I'm a Malayalee Syrian Christian myself and I'm aware that a number of government ministers of the Varma kings were Christians. What I said was that in this situation, non-Malayalee Brahmins would be seen as
foreigners. Any government attempt to create a shared identity will have to be based on Malayalee ethnicity because if they use Hinduism as the basis they alienate the 44% of the population which is not Hindu. You have to realise that an independent Travancore will be an ethnic state.
This is a highly evolved culture. There is a school of thought that suggests that the fundamentals of the calculus were first written down in southern India and transmitted to Europe via Portugese traders (from Portugal it went to England, their close trading partner).
I'm aware of my culture's achievements, but they're of zero relevance here.
I don't think the British nor Americans understood the value of a pro-American, free market state taking hold on the Indian subcontinent. So they would not have stood in his way.
Had the Truman recognized Travancore, it might have made an enormous difference in the course of history.
In the immediate post-war atmosphere, no one was really concerned about establishing "free markets"- indeed the general received wisdom was that planned economies were best for newly independent developing nations. The shift towards free markets only really came in the 60s...and even then a lot of the Asian Tigers aren't the best examples of free market economies- Japan and Singapore for example had/have a
lot of government involvement in the economy.
Just speculating, but an independent, pro-American Travancore most likely would have established diplomatic relations with Israel and provided an alternative to relying on Islamic nations to fight communism.
But I see no reason why this would be any concern of Travancore. India, even though it opposed the partition of Palestine established full diplomatic relations with Israel in 1950.
You still haven't explained how the King somehow manages to handwave away the large, educated, highly politically active, left-wing lower middle class that was already present at the time.