Group members sometimes fail to consider a range of viewpoints and alternatives in an effort to maintain cohesiveness and a "united front." this is called:

I believe this is called Groupthink.
Groupthink will make members of a certain social group feels the pressure to hold on to a certain value/principles in the fear of being outcasted as a pariah.
Because of this, it is really hard to introduce a differing value/opinion to this type of groups.

The adams apple, or laryngeal prominence. is a feature of the human neck, and is the lump or protrusion that is formed by the angle of the thyroid cartilage surrounding the larynx seen especially in males.

What area are in blue