Earlier quoted context omitted.
That's the most cringy part - in the second iteration you'll note he did list UNIX as a skill, but then the recruiter went on about the lack of Linux experience (which he had just replaced)! Like playing whack-a-mole.
Yeah, that's the part that gave the game away when the recruiter did the whack-a-mole move. The recruiter did in fact know exactly what the difference was and he was obstructing the candidate. Who knows why, maybe he feels there are too many asians working at Facebook so he takes it upon himself to play games with applicants who have asian names so they are more likely to give up, but he can still have plausible deni…
"Never attribute to malice that which is adequately explained by incompetence/stupidity"
Hanlon's Razor definitely applies to your theory!