What you said is 100% true, but it is only in Malaysia and Singapore, not in Indonesia.This is not true. Their hatred against Tamil can not be more than against Bangladeshis to those who follow Bahasa Maleyu and Bahasa Indonesia media. 'Bangla' is a slang word in Malaysia and Indonesia. They coined the term Banglasia not Tamilisia to demonstrate their racial anxiety. You should follow their media in their own language to know better. I give you some hints, go to Youtube or Facebook, search with such words 'Orang Bangla', 'Negara Bangladesh' or 'Bangla TKW' and follow the contents. Use google translation. At least you can visit Quora to find some objective opinions about the problem.
Man, even in their school they make fun of bangladeshi people.