Yes, it is interesting, because your initial claim that you are now trying to support was "many books that liberal educators don't like been removed from libraries".
I grant you, many liberal educators are probably parents. But I think your claim is still unproven, indeed contradicted by your evidence, except for the story from Spain.
"She has been asked by the local It’s Your Tea Party Florida, a Marion County-based conservative political group, to remove 14 books from school libraries."
"Those challenging it, however, find it anything but heartwarming. Instead, it is “anti-family” and “promotes the homosexual agenda.”"
"The most frequent challenges are from parents"