So Nancy is somewhat influenced by Laura Mallory, and the concerned parents like her. The gist of it, from Wikipedia:

In September 2005, Laura Mallory, a mother of four children in Loganville, Georgia, attempted to have the Harry Potter books banned from her children’s school library on the grounds that they promoted a religion, Wicca, and thus for a public school library to hold them would violate the separation of church and state. On her website, she states, “Harry Potter is being used to teach and promote witchcraft, Wicca, a U.S. [Government] recognized religion, in our schools, classrooms, and to this entire generation.” Mallory said the books carry “evil themes, witchcraft, demonic activity, murder, evil blood sacrifice, spells and teaching children all of this.” Mallory, who is a Christian missionary, said that she believed the books encouraged children to practice religious witchcraft or become Wiccans. Mallory also commented that she has not read the entire book series because “they’re really very long and I have four kids. I’ve put a lot of work into what I’ve studied and read. I think it would be hypocritical for me to read all the books, honestly”. Following her case’s rejection by the school, Mallory then took her case to the school appeals committee, but was rejected again. On 20 April 2006, Mallory took her case to the Gwinnett County School Board, but on 11 May, the board voted unanimously against her. In June 2006, Mallory launched an appeal against the County Board’s decision with the Georgia State Board of Education; that appeal was rejected the following December. In January 2007, she appealed to the Gwinnett Superior Court; that appeal too was rejected three months later. She considered taking the case to federal court, but spent the following summer with her husband and four children. She is now an ordained minister for children and young adults, claiming that her case against Harry Potter has inspired her to a new calling.