US Tech Solutions Buyer interview questions

An indian recruiter contacted me over the phone. I could barely understand what she was saying. Feels like it was a scam, because her concern was how did i get my green card. Of course she was told it was none of he business, after that i simply hung up. Don't feel like working with someone who can't speak proper English and whose interests about me are not job related. Not even sure it was legal for them to ask this question.