What does that mean?
Why is it important to find out who the prayer person is?
What does someone repeatedly calling an overweight person fat in a public forum say about them you mean? You tell me.
Like many conspiracy theories in this case or many observations in the evidence it's important to test them, especially for those who, if found out to be true, will change everything they have come to believe about the case.
In this case the theory is "Prayer Man is Oswald" and dispite all the effort no one can prove it's not but we remain optimistic.