He is Tamil. They cant speak Hindi even if their life depends on it

Really?
Pretty generic sweeping statement, eh mate?
The below Prominent Tamilians, from my memory speak fluent Hindi, possibly as well as you, if not better.
- Mithali Raj
- Veda Krishnamurthy (indian female cricketer)
- Ashwin Ravichandran
- Dinesh Karthik (is from chennai but possibly a telugu speaker as well)
- Murli Kathik (as above)
- Murali Vijay
- Rahul Dravid (Tamil bharadwaj iyer from his dad's side, in additon to what wikipedia says - the dravids moved from Thanjavur in tamil nadu about 300 years ago to the holkar states of indore, Gwalior etc, they are iyers but had the blanket surname of Dravid imposed on them, i know his uncle Chandu Dravid)
- Shreyas Iyer
- Subramaian Badrinath
- Shantha Rangaswamy (india's woman version kapil dev before kapil came along)
- Venkatesh Iyer (IPL cricketer)
- Dr Anand Ranganathan Bharadwaj Iyer (author, scientist, media personality)
- J Sai Deepak (media personality)
- Anand Narsimhan Srivatsan Iyer (Times nows news anchor)
- Abhijit Iyer Mitra ( media personality)
- Subramanian Jaishankar (minister)
- Nilakantan Iyer (navy admiral)
- Air marshal P V Iyer (check his you tube - mind blowing fitness at age 90+)
- Shri Subramanian Swamy (politician)
Heaps of entertainment, movie arts and culture personalities....
Several others too numerous to name here....
Next time try thinking what you are posting and what site are you posting.
At the very least those i named above did'nt comment negatively on their own country men on a foreign, read pak site.
Neither does knowing a language or not knowing it or the level or prowess or having an accent or not having one show any kind of superiority or inferiority, mate.