treasures of indulgence for brands in the burning

I'd like a comment on the meaning of treasures of indulgence for brands in the burning in the excerpt below, and also what only derision for those who succeeded in getting snatched from it means, i.e. snatched from what?

Poor Rose Coles's miserable marriage was of the number; and what good had come of it for her or for Halston Skeff? They had hated each other from the day the minister married them; and whenever old Mrs. Skeff had a fancy to humiliate her daughter-in-law she had only to say: "Who'd ever think the baby's only two? And for a seven months' child--ain't it a wonder what a size he is?" North Dormer had treasures of indulgence for brands in the burning, but only derision for those who succeeded in getting snatched from it; and Charity had always understood Julia Hawes's refusal to be
snatched....

.

The people of North Dormer could show great tolerance for people who are unfortunate and have got into trouble, but are intolerant of those who have somehow managed to get themselves out of it.

It implies a judgemental and somewhat unpleasant community.

Thank you very much, Anglika.