Just my two shekels here ...
Can't speak for the authors (and wouldn't even if I could), but I'm sure they're well aware that God is not "all peace." But God is at war with sin and its champion, not with Arabs (or any other race of people). How to read and understand The Revelation (singular) of Jesus Christ is a profoundly difficult book, one that I would hope that all Christians---regardless of which systematic theological plantation they inhabit---would realize defies simplistic interpretations. The language is highly symbolic and poetic, for one thing; assuming these are all literal events isn't warranted by the context or the literary style.
It's angering, frustrating, and heartbreaking to me to see so many evangelical Christians turning into warmongers over a very narrow reading of Scripture. If they're not continually wrong in predicting the date of Christ's return (in spite of Christ's specific reminder that no one knows when He'll return), they're completely missing the whole point of why we're here---Christ said "Go ye and make disciples of all the world," not to make Israel a racially pure state, or to worry ourselves incessantly about what day and time He will return.

In other words, salt and light, rather than armchair Middle East envoys.
In the meantime, there are plenty of people all around us in pain, searching for answers. All prophecies will pan out eventually; let's do what we're commissioned to do by the Lord Jesus Himself (the "go ye" part), and leave the rest to Him.