Bigotry

Etymology

From "bigot," a word of disputed origin; French "bigot" was a term of abuse before it came to mean a religious hypocrite, then a stubbornly intolerant person. The precise source is genuinely unknown.

noun · /BIG-uh-tree/
Stubborn, intolerant attachment to one’s own group or opinions and hostility to those who differ.
What it names
Names intolerance as a fixed disposition — not a passing bias but an entrenched refusal to allow others their difference.
Example
What began as an offhand joke revealed a bigotry he had never bothered to examine.
Related idea
Prejudice is a pre-judgment that evidence might correct; bigotry is prejudice that has hardened into identity and refuses correction.