This is not a "new" definition at all. This has always been the definition. Not sure why you're thinking its changed but here is the definition according to Websters Dictionary 1828 Edition: BIG'OT, noun
- A person who is obstinately and unreasonably wedded to a particular religious creed, opinion, practice or ritual. The word is sometimes used in an enlarged sense, for a person who is illiberally attached to any opinion, or system of belief; as a bigot to the Mohammedan religion; a bigot to a form of government.
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