The fact that they are Indians is totally irrelevant here but the fact that they are humans and deserve to be treated like one, is not.
Don't get me wrong, I am against people calling Peter names and I didn't participate in bashing him. I have followed his blog for a long time, I eagerly await his book recommendations and read them, I felt bad for him when he didn't get that Google job and felt happy for the success of Browserling, I own a copy of Perl One-Liners because I enjoy his technical posts.
I don't even expect Peter to relate to his customers to this extent, but I at-least expect him to treat them like humans. I felt that this article's tone lacked empathy for humans which was wrong and although Peter doesn't deserve to be called an asshole for that but he does deserve to be criticized for it.