… Heinlein was always happy to pick up a bonkers ideological shibboleth and run with it in his fiction. He was sufficiently flexible to write from the first person viewpoint of unreliable/misguided narrators, to juxtapose their beliefs against a background that highlighted their weaknesses, and even to end the story with the narrator—but not the reader—unaware of this.
There is a technical, literary term for those who mistake the opinions and beliefs of characters in a novel for those of the author. The term is ‘idiot’.
The annoying right wing Heinlein Mil-SF stans that came along in later decades—mostly from the 1970s onwards—embraced Starship Troopers as an idealized fascist utopia with the permanent war of All against All that is fundamental to fascist thought. In doing so they missed the point completely.
(I confess that while the general sense of “stan” was obvious, I had to look up the exact source of the term. I added the hyperlink to make it easier for readers in the same place that I was.)
Stross does not name any “right wing Heinlein Mil-SF stans,” but I can think of a few SF authors from that period and later that could be so labeled.
See also this Twitter discussion.