the word "oversubscribe"
The future may look bright in St. Mark's oversubscribed Sunday school. But the outlook for Copts back in Egypt - if the world just passively watches - upsets Adel Messeh.
What is "oversubscribed Sunday school"? And what is "the outlook for Copts back in Egypt - if the world just passively watches"?

Question

the word "oversubscribe"
The future may look bright in St. Mark's oversubscribed Sunday school.  But the outlook for Copts back in Egypt - if the world just passively watches - upsets Adel Messeh.
What is "oversubscribed Sunday school"? And what is "the outlook for Copts back in Egypt - if the world just passively watches"?

Answer

If something is oversubscribed, it means there are more people signed up than they have space for. It's very popular and crowded.

The outlook refers to the Copts' future. If the world just watches passively, instead of taking action  or speaking out against those who persecute the Copts, the Copts' outlook, or future, upsets Adel Messeh. Adel Messah is worried about the Copts' future.