You seem to forget that these guys (True Christians(TM)) can't find their way into Heaven until most of us are cast into Hell, when His Righteousness plays his final cards and opens his planet-sized can o' whoop-ass on the damned unbelievers. They want World War III to happen, and they can just say that all that carnage is what God wanted (after all, God delights in the death of the wicked...). All the reasons they offer... well, that's just the packaging.
They can scream about love all they want, but the truth is somewhere between hatred and selfishness.