It's probably worth discussing this broadly, frankly.
That statement is about as unjudgmental as one can possibly be if you espouse the beliefs that person holds.
One might make the argument that it is not possible to be unjudgmental when you are against something like homosexuality.
Maybe that's true, but I'm not sure, so let's talk about it. As another example, many/most Christians also believe that not accepting Jesus Christ as your personal savior is a mortal sin. Do you feel this is arrogant and judgmental as well?
Maybe it is, but then, we're basically objecting to the entire concept of religion at this point: they believe certain things are true as an article of faith.