That is a very foolish comment. Christians killed millions of Christians in Europe and Christianity never died.
So, how can Islam die, your D. Highness? Mind you that Muslims did not kill millions of Muslims.
How do you manage to entertain such silly and absurd thoughts?
This is what I wrote: "If they kill eachoters then there is a chance Islam will disappear once for all."
Now I will enlighten you by re-writing that sentence and writing in caps some key words.
"IF they kill eachoters then THERE IS A CHANCE Islam will disappear once for all.
I don't see therefore any intelligent relation between my sentence and your posted to it.