What can the bishop quayle article tell us about the feelings of average americans in 1918

What Bishop Quayle was doing was putting into language (good language by the way) what others were feeling, but may not have had his ability to express. 

It is especially disheartening to read some things that may not be true. That was a practice that journalism adapted from neoclassic literature in England to well into the 20th century. We expect more from the clergy especially. They should not say anything that isn't exactly so. That does not seem to answer your question, but it actually does. Exaggeration or outright non truth is not what is important: expressing anger is.

And Bishop Quayle is very angry. He deplores what is going on outside of America's borders. He hates the murder of civilians. He mourns the force used to take women -- where men show absolutely no respect for them. He all but calls the German nation's soldiers barbarians fighting a barbaric war. He thinks the leaders condone this behavior. His readers want to believe him. That's what made his speeches and writings so popular. (I found this one just be googling it. It was delivered almost 100 years to the day ago).