On what grounds are you denying all Indian applicants?
What if a white person ends up cooking curry in your unit?
I hate the smell of curry and smoke, but on what grounds do you deny them... look through their application and find some other "reason" to deny?
Curry has nothing to do with race, nationality, color etc...it has everything to do with the original question of this topic "tenants that cook with curry". If the landlord feels or is experiencing a lost of money or business behind it then the landlord needs to come up with a way to circumvent it from happening again in the future.
The only way I foresee to avoid or minimize the same problem happening again is by coming up with a different method of screening and interviewing process to make a better "judgemental decision" when choosing who you want deciding the future value of your investment. If the landlord is adamant about circumventing offensive, foul, disruptive and etc... odors, not renting to thugs/felons, sex offenders, and any other "preferences" is by being more active and thorough in screening which can be as legally intensive as he/she wishes although they will be walking that thin line! I'm already assuming if you are a self-managing landlord then you are familiar with state & federal laws pertaining to illegal interviewing questions and practices, so with that being said, you establish a process that will help you and not hurt you. And lastly, as we all should already know, when treading the legalities of Real Estate you always would want to consult an attorney to make sure your are staying withing legal bounds, but for the sake of this post, my statements are meant to give perspective.