The discussion goes in direction of Westerners lecturing in a patronizing way an Indonesian to his/her language.
I was inclined to accept the idea of a "more inclusive" bule, but I think
@Missnaughty arguments are
prevailing. If Wikipedia, Indonesian vocabulary, Indonesians themselves, say that the meaning of bule is white foreigner, caucasian, then it means that(at least in Java and Sumatra, which is 80% of the population. As the discussion developed, I asked Indonesians that I know and they confirmed the above.
So, If it looks like a duck, swims like a duck, and quacks like a duck, then it probably is a duck.