So your suggestion is to admit defeat, tuck tail and run from the Islamics. Best India give up its NW territories. Thailand give up half its country. The Phillipines give up its southern islands. Isreal just disappears. Nigeria looses it's nothern half and so on. Maybe we should give up parts of NY to the Islamics too?
Well, the alternative involves wiping out entire nations, men, women, and children, which is something that is generally frowned upon nowadays.
Of course, it has been done....