Individuals whose lives revolve around religion, use religion to explain every event, and will fiercely defend religion at all costs up to and including death.
There are two types of Religionists:
1. Those who are mentally ill and
2. Those who are using religion to cover their misdeeds of epic proportions such as murder, rape, stealing, graft, child abuse, fraud, etc.
Both types feed off each other in their religious space and are harmful to humanity.