Good god you have no idea what you’re talking about if you compare “Hoklo” to “Angelino.”
I, too, am an Angelino. When I have kids it will not be in LA, hence they will not be Angelinos.
But the children of Fujianese parents who moved to, say, Malaysia, are still called Fujianese (or in Taiwan Hoklo), and the children of Cantonese immigrants to the US are still called Cantonese, not JUST Chinese. There is more at play here than region of origin. It is a matter of culture, language (NOT dialect), and personal identity.
Your criticizing Hoklos as crass and speaking a “prole” dialect would be more akin to the English saying the same about the Scottish. Or (heaven forbid) the Irish.