"Timid" is not the right word. "Fanatical" might be. "Scared to death" might also be.
I was on a bus with a heavy set elderly woman who was fanatically religious who insisted that everyone she encountered must believe exactly as she does (under threat of physical violence).
She used to believe in Reverend Robert Schuller because of his high cheekbone grin. But, she said that Schuller used to beat his volunteers if they didn't meet his full expectations, and said that he was preaching Satan's words.
I tried disagreeing with this woman on the bus, but I literally feared for my life.
She went on and on about how she had been volunteering at the Crystal Cathedral, in Orange County, California, for years, and noticed squirrely tax and business practices, as well. She even went as far as to comment on the then recent physical attack that Reverend Schuller made on an airline stewardess who was trying to deal with Reverend Schuller's blue robes (it made the newspapers, but Schuller blamed the stewardess).
I got the sense that she gave her heart and soul to a man whom she had thought to be religious, and was so badly hurt by realizing that he was a bad man that she went crazy.
Many theists are scared to death of their God. They fear eternal damnation (burning in the fires of hell for all eternity), etc.
They are so scared not to blaspheme God that they even fear pronouncing the name of the one whom they worship....calling him G-d rather than God.
Such fear can only come from Satan. For only Satan would be so cruel as to frighten someone so.