IndigoChild5559
Loving God and my neighbor as myself.
She probably isn't an intellectual, and doesn't know what "Theism" means, so doesn't use the term. There are many wonderful and devout Catholics who have a simple faith uncomplicated by discussions in religion and theology.That's not something that she calls herself, nor is it something that others call her in real life.
It's something that outsiders on the internet from the west sometimes refer to her and her religion on forums such as these, I suppose.
I'm not sure why.
A theist is ANYONE who believes in a God or gods. It doesn't matter if this belief is part of a given religion, such as Catholicism, or simply a "spiritual but not religious" person who has their own belief in God apart from a religion.
Basically, everyone on the planet either believes in God/gods (theists) or they do not (atheists).