You must address your wish or aadesh to all chettiars, vanniyars, reddys, nairs, yadhavs, thevars, pulayars (recently pulayar mahasabha took the stage along with shankaracharya); what will you do with the christian nadars and naidus? Even the secular government will soon recognise christian and muslim castes, another nail in the coffin of caste eradication campaign.
Lets get some education on the ones you mention..
Chettiars
The term Chetty is a title used across several communities. If you are referring to the Nagarathars, please be reminded of the Nakara guild. There is no evidence to show that these were a caste in the medieval period. Instead we have people as part of a trade guild called Nakara or Nagarathar (simply meaning, town dwellers). The Nakara guild was a branch of the Ayyavole guild. Please remember the claim of being vaishyas, starting off customs like karadiyan nombu, producing caste puranas and literature, all date to the late-colonial period.
Vanniyars
These make very tall claims like this -
Vanniyakula Kshatriyas (Pallava,Chera,Chola) History part1.flv - YouTube Various groups have been merceneries for various armies, or have got absorbed into victorious armies. Simply put, just tribal guys fighting for land and resources. How these vannis claim to be a caste i dunno, especially if they claim to be villavan (billavas).
Reddys
No such caste called 'reddy' existed in the medival period. What we had was the Rashtrakuta kingdom. IMO the 'Reddys' were associated with the Rathakaras (chariot-builders and charioteers) who got downgraded in the Baudhayana Smriti into Shudras. Little wonder that reddys have been farmers for the longest time, and no different from the palli famers. The details of peasantization (sanskritisation) process is uncomfortable to many.
These days they claim to have descended from a reddy kingdom (as though all of them descended from the ruling elite). Compare these to current claims of 'nadars'. The channars were commoners, and the 'nadans' were their army elite / rulers. Yet the commoners-channars started claiming to be 'nadars' as though they too descended from the nadan elite.
Nairs
There is no evidence these existed as a caste in the medieval period. There is no evidence that the early (sangam) period cheramans and nayara-khandas belonged to any caste called 'Nairs'. Quite obviously various groups crytallised as 'Nairs' over time.
Socially it is well understood that plenty of people claimed to be nairs in the colonial period, including farmers, dhobis (washermen), etc. This situation is an exact replica of the events in Andhra areas, where practically every other caste (occupation group) and tribe took on the 'Naidu' title (there are atleast 25 different castes and tribes who use the title 'Naidu' today).
Yadavs
I suppose you mean konars, gollas, and kurubas (??). You must be aware the idaiyars had a very low position in the chola domains. Anyways, there were far too many diverse cattle-herding groups and they are not homogenous. The people and their practices are diverse. There is no evidence that the konars / gollas / kurubas were a 'caste' in the medival times.
Thevars
I suppose you mean vellalars and kallars (??). I have already mentioned about vellalars from velams in the Aarakshan thread. Kallars are far too diverse and i wonder why various farming groups claim to be 'kallars' (if not for a better social position). Agamudaiyars were indoor palace servents in the vijayanagar period. There is no evidence of any connection between the velirs, and the vast myriad peoples who claim to be vellalars today. Yet again, peasantization details will turn out to be uncomfortable to many.
Pulayars
Of all the people mentioned here, i think, these are the 'real' people. IMO these are the actual descendents of pulastya, the ones who got removed from their brahmin position and were throughly ostracised by the new-brahmaKshatras (that is, the combine of brahmins and those who were absorbed into the varna scheme as 'Kshatriyas'. This combine was, i suppose, the ones who applied the manvantara canard to a social situation). I hope there are genetic tests on present-day Pulayars, to find if their Y-chr points to the presence of common founding ancestors. But ofcourse considering every social group experienced geneinflow, it could get quite tricky.
Anyways, well you see Sarang, none of these infact are a 'caste' group in terms of a homogeneous culture. None even professed the same occupation. Much less, no one depends on Varna.
The unfortunate point for everyone who seek caste pride is that, ancient man thrived on just 2 main sources of sustenence -- hunting and fishing. The more we go back in time, the more we find present-day 'upper-castes' going down to 'lower castes', until we reach tribes.
Ofcourse tracing the origins of tribes is to me impossible. But the tribe-caste contiuum is undeniable. Now those who claim to have descended from rishis and kings, have a huge problem with such a situation. They simply cannot imagine being compared to tribes. Some go to the extent of twisting results gotten from genetic tests.
Fact is, all ancient kingdoms were either hunter-gatherers or fishing tribes. The kurus, pandavas from vyasa makes them fisherman descendents (from satyavati). Krishna with a conch obviously means a coastal kingdom thriving on fishing (since coastal trade was non-existent 5000 years back). The inland forest-dwelling tribes were numerous.
What we have in mahabharat is actually the early state-formation period propelled by performance of ashvamedha (after the creation of brahmanas (texts)) to announce land conquest, and the organisation of society into the chaturvarna scheme.
Since caste is generally taken to mean "'occupational group", this is bound to change. We have new castes (occupation groups) like engineers, actors, lawyers, politicians, etc. Infact 'caste' of various people in the past too had always been changing. Now those who want to hold on to "varna-by-birth" have a problem on their hands.
Those who profess hindutva ideaology mislead people by claiming india had a glorious past, that all varnas lived in peace, that varnas were based on gunas (the worst of all canard), that everyone must oppose secularism, and so on.
So Subramanyam Swami and everyone who professes hindutva ideology better redefine hindutva or you are never going to get support from the vast majority of hindus.
You must ponder over why the shirdi saibaba (original saibaba's birth place and kutil) temple is having brahmin priests when the temple is managed by a non brahmin trust?
No surprise. Temples everwhere got taken over by 'brahmins'.
Who and where is this vast majority hindu society? There is a serious dichotomy between what is seen and what is understood.
The vast majority are the non-brahmins to whom hindutva ideology will never make sense.