> This is just as dishonorable as fat people demands like "everyone else should order double because 'muh fat acceptance'."

You're comparing apples with oranges here.

> The sentence I'm replying to betrays the lack of a strong moral backbone

Muh morality.
That's the right wing version of "being on the right side of history", literally the exact same thing.

> and is even in conflict with basic ancap principles.

I guess you're misunderstanding spectacularly here.
One such example would be child support.
When parents are divorsed, traditionally the father has to pay for child support until the child becomes an adult.
In the west now that women are making money, now they decided that the mother needs to pay for child support, so now the man's problem is a woman's problem.
And from what I understood, they're now abolishing child support all of the sudden.
If it's untrue, then just treat it like an example.
If it's true, then also treat it like an example.