The following Middle Eastern countries have over 100,000 Christians:
Saudi Arabia is the largest.
oil
The largest factor is ignorance.
Christians are still suffering discrimination, especially in Middle Eastern countries. There are several countries where you can be legally thrown in prison or killed if you are found to be a Christian.
Saudi Arabia, Iran, and India
The largest peninsula in the Middle East is Arabia and the largest country on that Peninsula is Saudi Arabia. The second largest peninsula in the Middle East is Anatolia and the only country on that Peninsula is Turkey.
Saudi Arabia and Iran.
The United States has one of the largest middle classes in the world, in terms of both absolute numbers and percentages of population. Other countries with sizable middle classes include Germany, Canada, and Japan.
Egypt, Turkey, Iran, Sudan, and Iraq.
Kind of. Morocco is in the middle range of African country sizes. It is the 25th largest country in Africa.
Christians currently control no country in the Middle East. All of the Middles East is primarily Moslem, except for Israel which is primarily Jewish. In most of these countries Christians have a protected status, but it is something that is more of a "paper right" than an actual de facto right.
No doubt Asia is the biggest continent, featuring China, Russia, the middle eastern countries, and some more countries.