I object to your over-generalization. Here in the US, it's not uncommon to deal with first-generation immigrants both professionally and socially. In fact, I've been dealing with South-Asian-accented English speakers in the US my entire adult life (I am 60).
My personal experience relating to the above news item:
A couple of months ago I was called by someone speaking with a South Asian accent (I can't narrow it down more than that). He claimed to be calling from the FBI (not the IRS nor immigration as in the article) and he forcefully told me that I was in trouble with the law. His approach was unprofessional, which made me skeptical, so I asked to call him back. He told me to look up the number he was calling from, which did turn out to be the FBI office in Albany, NY. He even sounded _proud_ of this fact. Yes, the scammers may have proud of their ability to spoof my caller ID!
I persisted, so he referred me to his supervisor. The supervisor _also_ spoke with a South Asian accent and _also_ started bullying me about being in trouble with the law. At this point I knew it was a scam and hung up.
Had I been a good citizen I would have called the FBI myself to report this, but I was just glad to be done with it.