Learn English – a good antonym for “infest”

Aura might work, as it has a generally positive connotation. There is also halo, though that might be a little over-the-top in this case, or the more neutral property.

I think collectivism may convey the concept you are referring to (www.merriam-webster.com):

• emphasis on collective rather than individual action or identity

• Any of several types of social organization that ascribe central importance to the groups to which individuals belong (e.g., state, nation, ethnic group, or social class). It may be contrasted with individualism. Jean-Jacques Rousseau was the first modern philosopher to discuss it (1762). Karl Marx was its most forceful proponent in the 19th century. Communism, fascism, and socialism may all be termed collectivist systems. See also communitarianism; kibbutz; moshav.

Collectivistic cultures: (www:psychology.about.com)

• emphasize the needs and goals of the group as a whole over the needs and wishes of each individual. In such cultures, relationships with other members of the group and the interconnectedness between people play a central role in each person's identity. Cultures in Asia, Central America, South America, and Africa tend to be more collectivistic.