Why is dere a harry potter theme park?

Uh, there is not a Harry Potter theme park. There is a Harry Potter SECTION at Universal's Islands of Adventure, but there's not a theme park. There's just a couple of shops and three rides in the section, and it has been incredibly popular, so the audience disagrees with you. And sorry to tell you, HP is universally appreciated and loved. Twilight - not so much. Yes, teen girls like it, but the rest of the world, ehh.