Should loyalty always be considered a virtue?
Is the concept of loyalty misused by the unscrupulous as a method of manipulation?
(…thinking about recent terrorist activities in France.)
Again, loyalty is such a complex subject, with so many variations of meaning.
Loyalty in the sense of blind trust in the face of any and all evidence is a variant of the worst aspect of faith, and is to be avoided.
Loyalty in the sense of being willing to retain trust in the face of uncertain evidence is a specific situation is something that is required at every level. And it has to be open to change if the weight of evidence is sufficiently strong over a sufficiently long period.
In this sense loyalty to me is an aspect of trust and commitment, and in my world everything has uncertainties, and no question is off limits, and some questions are very low priority – so loyalty in this sense is about the sorts of functions one uses to assign prioritisation probabilities.