I think the broader point that the Brahmin vote and politics is opportunistic and focused on power rather than ideology is true across India. Even in TN, Jayalitha, an Iyengar, managed to take over a party founded on the premise of anti Brahminism.
My point was not that the Brahmin votes in a uniform manner.
My point was that MOST Brahmins, when they do not feel threatened, tend to vote in clumps and clusters that tend to favour right wing Hindu nationalism.
Of course there are exceptions. I have quoted my own family before. That is not a show-stopper of an argument.
Jayalalitha (who was a Mysore Mandyam Iyengar, akin to but not identical to the Hebbars whom I know rather better) came to power in rather specific circumstances. Her mentor, MGR, was derided as Malayali, but was from a grouping that spanned southern India and Sri Lanka both, the Thevars (they have a much grander name for themselves, and Thevar is what the rest of us untermensch call them), the warriors of the southern-most parts, and dominant in politics over all other social sectors. For obvious social reasons, the anti-Brahminism of the Justice Party, followed by the DK, then the DMK, then the AIADMK, was buoyed up by the Thevars, smarting under the very dismissive way in which Tamil history was misrepresented and their role minimised. This was one of the grenades of social engineering in Tamilakam (to borrow a phrase from that scoundrel of a Governor), and it is still unexploded. If we did not have such incompetent idiots in office in New Delhi, we might have been tackling this and other unresolved caste issues.
To get back to our discussion, Jayalalitha was brought up as a Brahmin, but her paternity was anything but. That was widely known, and earned her no disrespect, instead being a source of a certain degree of conservative awe and respect in the presence of blue blood (blue blood, but of a caste that found it difficult to get matches, just as the Maratha descendants of Shivaji did, or the Scindhias, Holkars and Gaekwads, or Bhonsles of Nagpur). She was mentored by an individual who was not only a larger-than-life figure himself, but represented a fierce grouping in a state of enraged indignation at the short shrift they had been given. The resentment was directed at the Naidus and Gounders, as well as the Brahmins, and that may give you a clue to the dynamics of Tamilian social movements even today.
I would go to the extent of saying that Brahmins have enjoyed far more political power under Congress dispensations ( where the backward classes have usually had only token representation in the ruling elite) than under the BJP ( which has put several backwards , including Modi, in real leadership roles).
That is a very intelligent point, but the counter to that lies within your knowledge of Indian politics, beyond a doubt.
If you care to consider, it has always been that the BJP has acted as a political grouping of RSS people, the RSS considering the thrust and cut of electoral politics to be an undignified occupation not appropriate for cultured and educated people who prided themselves on their standing aloof from positions where corruption was a constant temptation. If you stop to consider the BJP leadership, you are indeed right to consider the eclectic leadership that they have received. If you turn to the RSS, however, the picture is radically different. And therein lies the key to your puzzle.