They damn sure intend to kill us if we do not convert.
Some of them do. But it's asinine to act as if all of them do, and equally asinine—and un-Christian, of course—to say "kill them all".
Indeed, such a sentiment simply mimics the exact same blind, thoughtless savagery which Islamic extremists display. Certainly nothing any thinking person should emulate.
Make no mistake: eventually the world may very well indiscriminately kill Muslims as an act of desperation—especially if the Muslim world fails to "clean up its act".
But to blindly advocate such evil—and that's precisely what it is—will always be wrong. Christ's example must always be followed—even when addressing Extreme Islam...