Let's say for a moment that there is a particular circumstance surrounding all interactions with a given group of people. This is a very large sample of people, representing a "group" only loosely, in much the same way that you could define all people who live in New York City as a group. It is highly unlikely that there is a single member of this group who knows more than a fraction of the total membership on any kind of personal level. In every experience you have with this particular group, this circumstance asserts itself, each and every single time. It is a circumstance that is frequently attributed to this group and to dealings with members of the group.
Give me a word that defines what I'm describing. Now give me a word that defines coming to expect this circumstance to repeat itself in future interactions with previously-unmet members of the given group.