You have conceded the debate by failing to find any quote from anything, written by Heinlein or anyone else, that contradicts my fairly extensive quote from Heinlein, not to mention my earlier quotes from his obituary, and from material whose source was Heinlein's wife.
I here and now decree a law, that shall stand alongside Godwin's law for all time, and that shall, in honor of my pseudonym, be named "Israel's Law":
In any Internet debate, the probability approaches 1 that the at least one party will abandon any semblence of argument, and reply, effectively, "yo mamma." When that happens, the debate is over, and the first one to call "yo mamma" is the loser.
Corollary: Any statement which admits no logical reply is deemed equivalent to "yo mamma." Examples include: you're stupid; you don't know what you're talking about; go back to kindergarten; ROTFL; etc.
Corollary: If one party calls "yo mamma" but does continue to offer rational arguments, then Israel's Law is not yet satisfied.
To quote Robert Heinlein:
All societies are based on rules to protect pregnant women and young children. All else is surplusage, excrescence, adornment, luxury, or folly, which can—and must—be dumped in emergency to preserve this prime function. As racial survival is the only universal morality, no other basic is possible. Attempts to formulate a "perfect society" on any foundation other than "Women and children first!" is not only witless, it is automatically genocidal. Nevertheless, starry-eyed idealists (all of them male) have tried endlessly—and no doubt will keep on trying.