Kuala Lumpur have problems with large numbers of foreign workers, theirs worse, they have Vietnamese, Myanmars, Bangladeshis, Indians, AFRICANS, ARABS, SABAHANS, SARAWAKANS, Indonesians...their own Indian workers from the plantations etc..
Some years back there was a massive fight outside Sura KLCC...I think from that incident, the foreign workers are allowed to congregate at certain areas in KL & certain places...they control the numbers..