Whitaker Chambers claimed to hear echos of crematoria in her writings. Seems those echos mostly come from the left though.
I dunno if there's a "right" or "left" to his observation. I think his point would be that Rand had her own brand of strident and uncompromising ideology, in which one was either right, or a "looter." She not only wrote that way, but actually lived that way among those who formed her personality cult (they called themselves "the Collective").
If you take that attitude into a position of political power, it's not a stretch to see that there's a ready-made class of undesirables, whose presence endangered the whole setup.....
Yeah, I can see where crematoria would come into that.