Did Chambers actually read the book? To a gas chamber? That's an insane reading of it!
That's a bit of dramatic language ... but OTOH, speaking as somebody who's read the book several times, Chambers is essentially correct. Rand clearly doesn't care who dies, if they're not among her Select Few. (The fate of Eddie Willers, for example.)
Along the lines of another critic who said of someone that what she heard was:
“You lie - BOY!”
See how that works? It ain’t what they said, it’s what you THOUGHT they should have said.