Some of the drivers of this unholy mess are fundamentalist nut jobs on 3 sides - including the "Christians" in the US who have the ears of Congress.
So wars bring economic advantages via the industrial military complex which will be cynically exploited, because the non-believers don't give a hoot if their money comes from deranged believers.
People in general don't want to believe that what's going on is heavily underpinned by people acting for their particular Sky Daddy, because we've science our way out of that, right?
There's a very interesting Al Jazeera documentary on YouTube called "Praying for Armageddon". It covers all of this very succinctly. Some influential people believe it's their divine duty to bring about the second coming of Jesus, some have the red heifer thing going on, a scary number are wrapped up in End Times scripture.
The economic and religious factions are involved in a massive circle jerk that suits them both.
Honestly I don't give a shit why who is doing what, but in this day and age, wholesale slaughter of anybody for any reason should be off the table. As ever, average Jo and Joanna and their kids end up collateral damage while people protected by bunkers and money get off on their delusional self righteousness.
Nothing new under the sun.