Instead of a diploma, one recent college graduate should have received an “Incomplete.” She seems to have missed some courses: “Gratitude 101,” “Introduction to Civics” and, finally, “Flag Waving and the Importance of Context.” Indira Esparza, a newly minted graduate of the University of California, San Diego, who entered the U.S. illegally with her parents when she was a toddler, certainly made an impression at commencement.