For me it is just so very sad the people that have now become part of her world, or were always there and she remained sheltered from, or chose to detach herself from. Or even more so, the people that take her and use her for their own purposes and she may out of complete innocence "trust" them. I believe her heart is and has always been in the right place. And for those wishing to use her for their own ways, her innocence/trust, and even her faith, is a potential "goldmine".
I agree with you I think that sadly Katherine is being used by these people. But she may not see it or even know whats going on. That song was just awful anyway dont understand why that was put out there.