Why are they so obsessed with self-hatred?

WE HAD A STUDENT-LED CHAPEL AT MY HIGH SCHOOL AND SEVERAL STUDENTS SAID THINGS LIKE, "I DON'T DESERVE GOD'S LOVE BECAUSE I'M A SINNER" OR "I DON'T DESERVE ANYTHING EXCEPT ETERNITY IN HELL"; AFTERWARD, WE PRAYED FOR THE FAMILY WHOSE SON KILLED HIMSELF LAST YEAR AROUND THIS TIME