Do you have a bachelor's degree in philosophy and have concluded that Harry Potter contains no meaningful ideas?
So you haven't read (or, I suspect, heard of) the Summa, then? You see no problem with criticising the church when you are ignorant of its teachings and traditions? You are willing to vocally criticise the church when you have not given even cursory study to the logic behind its point of view?
Not only that, but you, who are unfamiliar with the work of St. Thomas, feel that all the respect for him by people who are familiar with his work must be undeserved just because he believed in the existence of God? If you knew who he was and had a specific problem with his reasoning, I would respect that. Instead, you are just dismissing one of the most important figures in Western philosophy by comparing him to J. K. Rowling because you are unwilling to consider the possibility that somebody came up with an answer to your devastating "prove it" argument in the 13th Century.
You're the one who brought it up; are you saying that you were only making a general statement without having any specific examples in mind?
Yes, I was just making an observation about why people believe in God. If you want an example, though, consider Acts 9:3-9.