A dominant outgroup overrides even a sizeable ingroup's protection [causal]
For example, if the others in the setting form a group larger than the one of which the individual is a member, his own group may have little success in shielding him. Thus, I once observed a group of seven military prisoners, handcuffed together in subgroups of two or three, enter an airport terminal, suffering from acute embarrassment and humiliation. Heads were lowered, eyes were averted from others in the setting, faces were pale and strained, despite an obvious attempt to act unconcerned. When their three military guards ordered them to sit, all adjusted their postures so as to blot out any view of the handcuffs from all but the nearest or most attentive observers. While the size of the prisoner group was fairly large, the fact that they were quite obviously prisoners pushed all others in the setting into a group of nonprisoners.
DEFINE: Illustrates how group alignment in a setting depends on whether one's group outnumbers or is outnumbered by others present.
Lyn H. Lofland, World of Strangers_ Order a…, loc. 821