From "pseudo-secularism" to "minority appeasement" to "cultural nationalism", Advani coined the lexicon of the post-Independence BJP.
Advani created a movement that demolished the Babri Masjid, but the ruined masjid has taken its revenge on Advani. The word "secularism" has dogged Advani's footsteps, a word he has by turn rubbished yet sought to re-interpret.
The word secularism was the reason he was thrown out of party presidency by the sangh when he asserted that
MA Jinnah was secular. Today Advani, the anti-secular Hindutva icon, finds his own complicated relationship with the word "secular" interrupted by a hardline personality cult that has no time for those tortured old debates.
As Moditva becomes the reigning ideology of the BJP, who cares anymore about an octogenarian's decades long ideological battle with the Congress vocabulary?
No wonder the patriarch is in open revolt. As his party elects by democratic process the choice of the cadres, Advani has pricked the Modi bubble by making allusions to a Hitler, Mussolini and 'personal agendas''.
Advani may be motivated by ambition. Advani may hope that his own newly acquired "moderate" image, will be a magnet for future allies ranging from the BJD to the JDU to the TMC and that he - and not Modi - is better placed to be the prime ministerial choice even at the age of 85, and even after leading his party to defeat in 2009.
Advani's own political cycle has gone from Jana Sangh moderate to Hindutva hardline to post-Vajpayee moderate again. He's seen the immediate popularity rush of a polarising movement, he's also seen the electoral pitfalls of such a movement.
The BJP went from two seats to 182 in the Atal-Advani era but even then it took the inclusive persona of a Vajpayee to cobble together the vote- catching NDA. Perhaps Advani has understood the electoral maths better than the Modi acolytes in the BJP, repeatedly asking the party to reach out to minorities, going on record to say the demolition of the Babri Masjid was "the saddest day of my life".
Perhaps Advani has another fear. Perhaps what Advani, a party man for six decades, really fears is that Modi's personality cult will undermine the inner-party democracy in Delhi just as it has in Gujarat. That under Modi, the party he and Vajpayee built will cease to exist.
Modi's rise is spectacular. An up-by-his-bootstraps pracharak from the small town of Vadnagar in Gujarat, is now "the" face of the BJP. However much the BJP may say that Modi is only the head of the campaign committee, or that he is one among a "galaxy" of leaders, that he is still not the declared prime ministerial candidate, the fact is post 2014 Modi will be the natural claimant to the top job.
What kind of politics does Modi represent? Narendra Modi's economic model in Gujarat may be admired as business-friendly market economics. But his political model in Gujarat is vintage Indira Gandhi. Perhaps LK Advani, always a man of the party, anti- Emergency warrior against the Congress for decades, senses precisely this.
Indira Gandhi exemplified ruthless power politics and extreme centralisation of power. When the Gujarat BJP's Haren Pathak declared that "Modi is the BJP and the BJP is Modi", he sounded eerily similar to famous Congress loyalist DK Baruah who said "India is Indira and Indira is India".
In 1969 Indira Gandhi threw out the Congress old guard or the Syndicate, split the party and formed a Congress party loyal only to herself and her own ideology of populist socialism. This party was totally subordinated to Indira's towering personality cult, it was a cult in which the Supreme Leader reached over the head of the party to create a direct covenant with voters.
Like Modi, Indira's chemistry with crowds was legendary, she ruled through loyal bureaucrats and destroyed party institutions that her father respected until his dying day.
The Modi model of politics in Gujarat is strikingly similar. From Keshubhai Patel to Kanshi Ram Rana to Suresh Mehta, members of the Gujarat BJP have been systematically sidelined or eased out of the BJP. Modi rules Gujarat through his loyal bureaucrats, just as Gandhi did. His political opponents have been vanquished in true Indira style.
The BJP cut its teeth in anti-Emergency protests, but Moditva retains within itself traces of the Emergency. Modi is known for his trenchant attacks on the media, books like Great Soul by Joseph Lelyveld have been banned in Gujarat, action was taken against films like Fanaa, and human rights bodies and trade unions in Gujarat have been rendered dysfunctional.
With Modi's constant targeting of the media as "biased" will there come a time when a "biased" media is sought to be tamed just as Indira Gandhi once clamped down on an "anti-national" Press?
Towering personality cults inevitably undermine democracy. On Hindutva, Modi remains a figure who mobilises but also polarises.
Does Modi want to be figure of administrative efficiency who creates big growth but in the process also ends up, much like Gandhi, demolishing institutions of public accountability? Or does he want to keep up the ideological challenge to Nehruvianism by debating with the enemy in democratic terms?
We can question Advani's methods of publicly denouncing his own party. But as the 85-year-old yatri fades into the sunset, his message can't be ignored. How very ironical that it has taken the politician who was the ideological mascot of the Ram Janmabhoomi movement to today being portrayed as the reluctant fundamentalist.
Sagarika Ghose is Deputy Editor, CNN-IBN. The views expressed by the author are personal.