Difference between pure blood and muggleborn blood in fics
In many fics I've read there are anti-muggleborn curses put on things like books/artefacts that only affect muggleborns as well as wards that block muggleborns from passing through. This confuses me because if there is supposedly no difference between pure/muggleborn/mixed blood, how do these curses and wards recognise blood status? To my understanding, you either have magic or you don't, the blood is the same. the differences between "pure-bloods" and the others are only cultural.
How funny would it be if Hermione entered a room or read a book which she supposedly can't touch because it is warded against muggleborns, but the joke is on them because magic can't bar her from it because there isn't actually a difference in blood.
What do y'all think?