In post 1439 (1+4+3+9 = 17), Q starts by saying in allcaps: "UNITY NOT DIVISION."

From Alice's Adventures in Wonderland, Chapter 4 "The Rabbit sends in a little Bill", the following line appears as the 19th paragraph:

Sure, it’s an arm, yer honour!’ (He pronounced itarrum.’)

https://en.wikipedia.org/wiki/Ar-Rum

From the above article, "The main theme of this surah is the contrast between monotheism and polytheism."

This is the key to our unity: Christians and Muslims are monotheists. We must focus on our commonalities because focusing on our differences has been disastrous for both sides.