what are the causes of mental illness besides religion

this is one question I hate the most!
people of higher education think they know the truth of what is mental illness because they are taught to believe in a book.

the most fundament flaw in all psychology is the Non existence of God.
mental illnes has more than ONE source and psychology will not even admit that demonism and fallen angels can be ONE cause. that poisons and prescription and illegal drugs are a very major source of all the others mental illness. in my opinion.
those that practice making poisons are the first to deny it ! always.
because they are criminals

religious beliefs are not mental illness. NO.

sugar imbalance can be. stimulants can cause it too. Coffee or cafeine can cause memory loss. too much pcp can cause rage. lsd can cause paranoia.
the techniques of black magic have been testified that such practices can cause a mind to fracture some have even said that split personalities in mind control techniques are the desired results and sleep deprivation can cause mental illness as well.