Very Interesting Gokul. Actually i was pondering on this subject not on a historical prospective but on a Sociologically prospective.
I was wondering whether it would be possible for a King to be Jain. A Jain is to follow ahimsa 100%. A King who had to fight wars constantly, following Jain dharma will not be possible. Kingls like Bimpisara when he became Jain abdicated . Simillarly Mahendra Pallava was Jain when he had an absolute control over the Krishna – Cauvery land and had no war to fight. When an enemy came,he couldn’t have fought Pulikesi while following Jain dharma.
Where as Sanatana Dharma kept Ahimsa only to Sanyasis and allowed Kashatriyas to fight, expand country as his dharma. It advised vegetarianism only to Brahmins, that too in kaliyug and allowed non vegetarianism to others and thatwas more practical.
The high standard of Ahimsa was practicable only to Brahmins of that day, Peasants who lease their lands and not tilling, Local traders ( again overseas traders can’t be 100% veg).
That is why even today Jainism survives only in such communities like Marwaris, Gujratis, Kanndiga pesants/brahmins and Tamil pesants.
The High vegetarian standard and No war policy must be the major cause for the decline of jainism and blaming some one for that may not be right. ( Now i find every where saivaites, saivites – Adisankara and deekshidars are out of fashion now. Sambandar and Saivaites are the latest fashion in these works)
Simillarly Bhudhist slowly went away from ahimsa, dissuaded women in sangam, started more on philosophical thinkings, built viharas and became totally different from what it was in Bhuddha’s time. It was very easy for Kumarilla Bhatta, Mandan Mishra and Adisankara to win over.
I strongly feel that if not by Appar – Mahendra must defenetly be converted by Pulikesin.