It is impossible to predict the future beyond what the Bible reveals about the End Times. But, assuming that the Lord does not return during the next 25 years, what will be the influence of Islam compared to the influence of Christianity in the west. By "the west," we mean Europe (i.e., most of Europe, not necessarily every nation in Europe) and North America (US, Canada, Mexico).
In the poll, we are assuming already that Europe will be more influenced than North America, so the question is not so much about which will be more. The comparison is between Islam and Christianity.
There are a lot of possible equation changers. God is sending dreams of Jesus to the Iranian and Muslim people; click HERE for an interesting article.
It seems many Muslims are coming to Christ in Islamic countries, while Islam is spreading in the west. Will Islam overtake the church in Europe (it seems it already has). How about America? What is your best guess?