In my experience, many people do not know what the "blood libel" is, which is true of most antisemitic myths! But it leads to the term being colloquially misused. That's why I wrote this short piece in 2024 that explains the libel clearly and why it still matters today. Gift link:
The Passover Plot
The dark legacy and ongoing body count of an ancient anti-Semitic myth
theatlantic.com