Canada's own Fr. Raymond J. de Souza puts this stance within the context of her Catholic faith with this piece in the National Post: A tale of two Kennedys.
The Shrivers represented the old Democratic Party -- economically liberal and culturally conservative. . . . Eunice was the ideal of the Catholic in public life -- passionately committed to the poor, defender of the weak, pro-life, morally upright and a woman of faith and family.
May she rest in peace until the resurrection.