Gay Penguins

In Illinois, the United States, some people request that the book called "And Tango Makes Three", which is a book about homosexual penguins, should be removed from elementary school library. This book is based on a real story which occured 7 years ago. Some parents, who are conservative catholics, claim that the story of gay penguins is not good for education and shoud be taken away. However, the principal said that "Various kinds of people in different beliefs use the library" and the book is not planned to be removed. What do you guys think about this issue? do you agree or disagree with the idea of removing the book?