There's more than one point. One is that it assuredly isn't Rowling's point of view, and another is that regardless of who said it, it isn't a rationalist statement.
I recommend that we have a convention of not just attributing quotes to their authors, but at least mentioning if a quote is the words of a fictional character. Ideally, there would be a link or some mention of context.
Here's the new thread for posting quotes, with the usual rules: