We are often called “Angry exmormons”, or the anger and bitter felt is commonly used to imply that our arguments have no merit. When this is used on me I remember this paraphrase of Aristotle:
“It is easy to be angry. But to be angry with the right person, at the right time and to the right degree that is hard – that is the hallmark of a civilized person.”
It is unfair to for the LDS church or it’s members to identify every exmormon as angry or to say they have no right to be. But that the vast majority of exmormons correctly express their anger at the upper levels of the institution and do not take it out on local level buildings or members should be a great indication that none of them are possessed by devils, or at least their devils are civilized.