There are two Islams in the world today. (1) There is
the Islam of the Qur'an, which is one of the great
religions of the world. It is a religion of peace (not of
pacifism nor of aggression) and of divine justice (not of
divine tyranny nor of divine intimacy). (2) There is also
the Islam of the terrorists, who are murderers and
assassins, especially murderers of their fellow Muslims.
Shiites and Sunnis hate each other for their "heresies"
more intensely than either hates the West. (The London
bombings deliberately targeted Muslim neighborhoods.)
Which of these two Islams (of the Qur'an or of the
terrorists) will prevail? God only knows. But to whatever
extent the first Islam is from God, it will prevail because
God will prevail.

I do not see how a Christian can deny that (1) there is
much in Islam that is from God, beginning with its
essence, total surrender to God's will. Nor do I see how
a Christian can deny that (2) there are things in Islam
that are directly contrary to God, beginning with its
rejection of Christ as divine Savior, and its ignorance of
the amazing "good news" that God is love and has
destined us not for eternal servitude but eternal
spiritual marriage to him. It is very tempting, if you
clearly see either of these two things, to ignore the
other one.

There are also two Christianities in the world today.
There is (1) the Christianity of the New Testament, and
there is (2) the Christianity of accommodation to
modernism, egalitarianism, niceness, naturalism, pop
psychology, secular humanism, relativism, subjectivism,
individualism, "Enlightenment" rationalism or
postmodern irrationalism. New converts to the first
Christianity are constantly amazed and scandalized by
finding many of their clergy to be in love with the
second and in fear of the first. Which of the two will
prevail? If Christianity is from God (and the Qur'an says
it is!), then the first will prevail over the pablum
perversions of it.

I do not know which Islam will prevail. But I know that
the temporal fate of half the world depends on it. I do
know which Christianity will prevail, however, and I
know that the eternal fate of all the world depends on
it. I do not know the future of Islam, but I do know the
future of the Church, for I know Who promised her that
the gates of hell would not prevail against her. And if
hell itself will not prevail against her, I'm sure that
neither the Islamic perversion nor the Christian
perversion will prevail against her.
Thus there are not just one but four confrontations
between Islam and Christianity in the world today. ( I
am not speaking of the political and military
confrontation between Islam and the West, but of the
religious confrontations.)

First, there is the confrontation between terrorist Islam
and New Testament Christianity, between the sword and
the cross, between murder and sacrifice, between false
and true martyrdom. Christianity will win this
confrontation because "love is stronger than death"
and therefore also stronger than hate; because "there is
power, power, wonder working power in the Precious
Blood of the Lamb."

Second, there is the confrontation between Qur'anic
Islam and modernist Christianity, between conviction
and relativism, between honor and shamelessness,
between true and false justice. Islam will win this
confrontation (as it is already winning in Europe) for a
similar reason: because self-sacrifice is stronger than
self-indulgence.

Third, there is the confrontation between terrorist Islam
and modernist Christianity, between the sword and
relativism. This is also part of Europe's current struggle.
I do not know who will win this confrontation, because
both parties are based on falsehood and weakness. But
I think Islam will win because modernist Christianity has
no will to win. Indeed, it has no will at all.

Fourth, there is the real confrontation, and the only
real dialogue, between Qur'anic Islam and New
Testament Christianity. This is as old as St. John
Damascene. I think this high and honorable dialogue
between two high and honorable faiths will continue
(though the other three confrontations will get much
more media attention) and that something great will
come of it. That is the dialogue exemplified by the
conversations between 'Isa and his three Christian
friends, especially Fr. Heerema, in this book. In this
confrontation, both "sides" will win.

http://www.catholiceducation.org/articles/worldreligions/wr0003.htm