Singapore's Indian population is mostly Tamils from south India and Sihks from way up north...almost all coming well before Partition.
I always figured the joke was about either their respective malice or their intelligence but I could never decide which. It's Singapore's version of "a priest, a minister, and a rabbi..." jokes. It all depends on who you want to make the bad guy.
gotcha
based on the big rallies with modi in texas & india, I figured trump had an edge with the Indian voters.
now with anchor baby, kamala harris on the dem ticket (although press is trying to make her into more of an african american)do you think she will attract the Indian American voters??