Hopefully there will be no intention of capturing the members of this Islamic State they need to be killed, the sooner the better.

Hmm. I seem to recall people saying similar things about the Taliban a few years ago. Then we found out that many members of the Taliban were actually young men who didn't have a clue about "the politics" who couldn't make money to send to their families any other way. Death is so bloody final, isn't it, in the immortal words of Basil Fawlty. It's always a shame when you kill someone then find out you might have made a mistake.