This right-wing post about bread is a microcosm of the entire immigration debate, when you think about it. You can find wonderbread anywhere you go. What she's upset about is that anything besides wonderbread exists on the shelves in plain view and that other people like it.
Surely if they want proper, old-fashioned bread, with none of these modern, soft, conveniences, they want proper old fashioned stoneground with bits of grit in it to wear down the teeth?
Yes, she wants the same bread her mommy used for her sandwiches, and doesn’t want anyone getting the different bread they got from their mommy. It upsets her to be reminded that other people had different childhoods, or might want to have a different adulthood.