The main problem I have always seen with confronting the ex is that you keep the lines of communication open and it just creates more negative feelings than it releases. It can turn simple break up into dramatic nightmare.
You might try writing down your feelings and then destroying the paper. It can get them out, but not increase the drama.
She seems to be well on her way to burning her own bridges. Don't rebuild this one just to start another fire. Your silence should speak volumes in itself.