It's much simpler: Bangladeshi workers speaking Malay are a dime a dozen. Westerners learning a minority language in Malaysia are relatively few and far between. Millions of whites visit Malaysia as tourists but they don't become celebrities.
It's also not about "worshipping white skin", but about being amused and/or feeling validated by the western internet.
Finally, the protest against western backpackers asking from money (a recent fad protest in some countries) is irrelevant to this particular story.