Most people don't want to read most earnestly banned books. It's a very notorious book though, it would probably garner more attention than many uncontroversial books in the long tail of most library collections, which are neither loved nor hated, notorious nor famous.

But a lot of the people interested in reading it would probably have right wing inclinations, and the average librarian doesn't want to support that sort of thing (not least because the nazis themselves were big on book burning..)