That indian guy was sucking up to jap tourists , so of course he would make down sign!
If he was talking to chinese tourist, and jap walk past. He would also make down sign to suck up to chinese tourists
Its a Singaporean habit, we suck up to whoever benefits us , play 2 headed snake whenever situation arise. We are a nation led by Jap translator and his family. Its in our DNA, regardless chinese, malay, or indian