"There are these adamant Christians who claim Israel must be spared through bible prophecy because they believe when their punitive Jesus comes back, Jews will have to convert or be swept away.

Now let's have a look at what the Qur'an (the holy book of Muslims) has to say about Christians and Jews:

    Slay the unbelievers wherever you find them(2:191)
    Make war on the infidels living in your neighboorhood (9:123)
    When opportunity arises, kill the infidels wherever you catch them (9:5)
    Kill the Jews and the Christians if they do not convert to Islam or refuse to pay Jizya tax (9:29)
    Any religion other than Islam is not acceptable (3:85)
    The Jews and the Christians are perverts; fight them (9:30)
    Maim and crucify the infidels if they criticise Islam. (5:33)
    The infidels are unclean; do not let them into a mosque (9:28)
    Punish the unbelievers with garments of fire, hooked iron rods, boiling water; melt their skin and bellies
    (22:19)
    Do not hanker for peace with the infidels; behead them when you catch them (47:4)
    The unbelievers are stupid; urge the Muslims to fight them (8:65)
    Muslims must not take the infidels as friends (3:28)
    Terrorise and behead those who believe in scriptures other than the Qur'an (8:12)
    Muslims must muster all weapons to terrorise the infidels (8:60)

The Qur'an certainly proclaims that when the time is appropriate, Muslims must use force to convert the unbelievers to Islam. For the non-Muslims, the alternative to this is to pay the humiliating protection money (Jizya tax) or be killed (by beheading, of course). A militarily dominant Islam, without doubt, precludes the peaceful co-existence with the unbelievers if the Muslims have to abide strictly by the unalterable stipulations of the Qur'an.