【Affront】 , 【Insult】  and Indignity denote a speech or an action having for its intention or effect the dishonoring of something (as a person, a cause, or an institution).

An 【affront】 is a designed and usually an open mark of disrespect.

• an 【affront】 to the flag
• an old 【affront】 will stir the heart through years of rankling pain
  —Ingelow

An 【insult】 is a personal attack, either by words or actions, meant to humiliate or degrade.

• it is incredible the 【insult】 made to the liberty, to the life, to the dignity of the human beings, by other human beings
  —Vanzetti

An indignity is an outrage upon one′s personal dignity.

• whom I beseech to give me ample satisfaction for these deep shames and great indignities
  —Shak.
• to nearly all men serfdom was . . . a degrading thing, and they found trenchant phrases to describe the indignity of the condition
  —Southern