Why should anyone (Malaysia included) be expected to tolerate foreigners in their country. Indians fought long and hard to remove foreigners from their country, now they complain because people are treating them the same as they treated foreigners until 1947.
If you think those Malaysian Indians should leave Malaysia,then you should also agree that all those White Australians & White/Black Americans should also leave their current homelands-afterall they are foreigners over there.
Those Indians have little in common with the land of their origin barring their religion.Many were brought as indentured labourers by the British when they colonised Malaya 2 centuries ago,while others came as merchants.