Meaning: How terrible you are here

Question

In The Simpsons Movie, Flanders says this to Bart when Bart comes into the church.

How good to see you. And how terrible you're here.

I am not familiar with this usage of how here; as unfamiliar as I am, I couldn't not think it meant Flanders felt terrible that Bart was there. I assume, as Bart is not a church-going boy, that it actually means Flanders could see how terrible the things are going; "it must be terrible that you've come here." Could you tell me how it's used and give some examples? And is this common?

Answer 1

I can't imagine anybody saying this in real life, except to be deliberately offensive (possibly as a joke between friends). The only meaning I can get from it is "it is a terrible thing that you are here". It's an alteration of "How wonderful that you're here".