Bigotry

Bigotry:

The tenets or actions of a bigot; obstinate or blind attachment to a particular belief system or to certain tenets; unreasoning zeal; intolerance.

Note that in one sense to define 'bigotry' it is necessary to define 'bigot'. That means identifying actions or tenets that delineate bigotry.

The quality of the attachment is also a measure of bigotry.

Bigot:

A person obstinately and unreasonably attached to a particular belief, opinion, or practice; a person blindly attached to any opinion, belief system, or group, and bitterly intolerant of those who believe differently.

Note that in this sense the definitive aspect is not this or that particular belief or viewpoint. The defining characteristics are unreasoning zeal or blind attachment and bitter intolerance.

Thus there is the sense of bigotry defined by certain tenets. And there is the sense of bigotry defined by characteristic behavior including how one responds to a different tenet. Likewise with an opinion or an action or a practice or a group.

At times the quality of the attachment is bigoted but is also distinct from that to which the attachment has been formed. At times, vice versa. And, at times, the distinction is one without a difference.