egypt

No. There are substantial (but declining) populations of Christians and Jews in the middle east.

Not entirely, but close. The overwhelming majority (>90%) of Middle Easterners are Muslims. Jews, Christians, Druze, and Baha'i make up around 7-8% of the Middle East cumulatively.

NO. There are very few Buddhists in the Middle East. The Middle East is predominantly made up of Muslims (>90%). There are significant minorities of Christians and Jews in the Middle East and small minorities of other religions.

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.

Crusades were decreed by Popes.