I'm not reading the comments here the same way at all, as a "lack of even the most basic of human decency".
Rather, I'm seeing it more as just -- that's just life, what makes this particular case so special?
People move for jobs all the time (including internationally), and shit happens all the time (you get laid off, your significant other breaks up with you, a loved one passes away).
It would be one thing if Facebook was actively tricking him. But we all can assume it was just a normal hiring/transfer process that had been in motion for many months, and company-wide layoffs wound up hitting his team (which couldn't have been known months in advance), and so he was the victim of really bad timing. But not out of malice, and he's still presumably getting months of severance like everyone else, so he can go back to India with money and look for a new job, which he's presumably extremely qualified to do (having been hired by Facebook).
And heck, it's usually a lot better to get laid off after 2 days (living in a temporary apartment) than say 4 months (you've bought a house).
So is it a bunch of time and effort wasted? Of course. Does it suck? Of course. But people get laid off all the time through no fault of their own, and sometimes the timing is terrible. Which sucks. But does that make it HN front-page worthy? I think it's totally valid to say it's not -- but that doesn't mean you lack "even the most basic of human decency". It just means you don't think this is news. And that's OK.