I Think we should not waste our time. They are not going to accept any reality, anyway.
I second that. I gave a christian two detailed links about kaaba but he keeps uttering the same nonsense. No matter what you do, they won't just listen. Blindness...that's a curse!
So I have began to research on my own things and soon I'm gonna post a long article about terrorists specially ISIS inshaAllah.
Salam,
Tahmeed