This is one of those areas where society tends to get intellectually nervous, and when people get nervous they start shutting doors instead of asking better questions....
There's an old joke about The Golden Rule: he who has the gold makes the rules. Way back in the pre-Internet days, that usually meant the owner of the printing press determined what got to determine what was or was not published....
You are confusing the library with the librarian.
Yes, any open site contains the sum of human expression—the beautiful, the logical, and yes, the hateful. To be an intelligent entity, one must possess the form of these things to understand them....