Oh, incidentally, all the above claims are nonsense, as is the claim that Harry Potter will cause anyone to become a witch.
So no, maybe not all of the people I've named here are saying no-one should read Harry Potter - but all of them imply that if you're Christian, you won't. And I'm sick of it.
In reality, no one is stopping you from reading Potter. If you are fretting because some people say you aren't a Christian because you read Potter, the problem is with YOU, not them. They have the right to their opinion, right or wrong. Claming you have been harmed is rather hyperbolic. I read Potter and I'm not offended if someone says I'm not a Christian. They are entitled to be wrong.
What is offensive is using slurs like "fundie" and "fruitcake" to describe people who don't like Potter. Also, claiming that people who don't like Potter are involved in a vast conspiracy to deny First Amendment rights to people is equally offensive.
No one is stopping anyone from reading Potter. And it's ridiculous to blame people for something that isn't happening.