One reason that people don’t get along is that they have no idea what each others’ true positions are. They hear terms like “trickle-down economics” or “spiritual warfare” and get all angry without knowing what those terms actually mean. When they encounter someone who proudly supports such things, the conversation is much more often a yelling match than a learning experience.
I had an experience with the subject of spiritual warfare almost exactly like you describe in your book. A number of years ago, I led a small women's Bible study at my workplace and one day prayed rather vigorously against any demonic forces, etc. involved in a workplace issue. I assumed that everyone understood what I intended. Not so. One member reported me to her supervisor and I ended up with some explaining to do.