There have been so many replies since Mr Vajra came up with his poser, let me also chip in given my unique positioning.
I am neither a Tamilian nor a Kannadiga ; grew in TN, live in Karnataka.
So my positioning is unique, so are my perspectives, atleast thats what i think.
Running the risk of offending members here, which i dont really intend, it is my considered view that Tamilians consider themselves eugenically superior, led ofcourse by the egregious kazhagams.
Any other language is treated with scant respect with the recalcitrant kazhagams at the helm of affairs for the last 2 decades.
I also hasten to add that per se tamil is indeed a very very rich language with a heritage second to none. Where the pro-tamil groups err is in indulging in slander against other languages with hindi being the enemy no. 1.
The hatred against a language slowly morphed into hatred against the community.
Personally speaking, i was fortunate i have a solid founding in tamil (quite immodestly i have to say that i write 'what-i-like-to-call-as-poems' in tamil), so i didnt have to put up with too much for being a non-tamilian.
Sadly in due course, other southern states which are/were always wary of TN, emulated TN in linguistic chavunism.
However as far as Karnataka goes, there is still hope. As other elder members of the forum pointed out, a kannadiga is easily placated, if he is convinced that you respect the language and make a sincere effort in learning it.
As far as your case goes Mr Vajra, i think you have to first establish which is 'supposed to be your mother tongue' and where you intend to settle down.
Depending on this, you should make efforts to learn tamil or kannada or both. Being ambidextrous would give you lot of benefits including / such as enjoying
'Vizhiyile mani vizhiyile'
'Jotheyali jothe jotheyali'
and most recently
'Jaane do naa'
all set to tune by the maestro Illaiyaraja.