on speaking English to Malays
Almost ALL Indonesians think that Malay is a funny language.
Because they speak a more ancient form of Indonesian language (very much like the way Latin is to Italians), we tend to see Malay language rather condescendingly.
That one I get.
The one I don't get is when the Malays avenge us (meaning: they return those condescending stares toward us).
Why should they, really? There is nothing in them which is more advanced than what we Indonesians have.
Which is why, whenever I meet a Malay, I prefer speaking English. There is nothing in their cultural feature that I'd ever want to respect, let alone glorify.