Hacker News automatically strips question-words and question-punctuation from titles, to avoid click-bait.

What a fascinating story about an ALL-OUT WAR guys! You'll learn so much about cyber plots, tanks, politics, maneuvers and constant bombing between Apple and Facebook, actually even Mr. Zuck and Mr. Cook themselves taking massive risks in this sick conflict, a really crazy read! I felt like I was a soldier during WW2, no...even WW4? The title is so well chosen!

It's the "why is" in the original title that makes it not substantively different from the headline here. Both make the assumption facebook is in fact going to war