"Dude, I just saw some really weird,"

[nihil]

Well RC~ that is pretty much how I understood you. The American public misconception is possibly explained by the association of early oilfield development in the region with the arab states?

As for a few figures, I dug these out for number of Muslims:

Indonesia 213M
Pakistan 161M
Bangladesh 130M (remember that used to be West Pakistan)
India 175M

Sudan 26M
Ethiopia 36M
Nigeria 64M
Turkey 69M
Afghanistan 31M

Iran 67M (but they are Persians)
Egypt 73M (arabs don't build pyramids )

Saudi Arabia 26M
Syria 16 M

Jordan and Libya only have 12M between them.

Actually, the whole concept of "arab" is pretty vague. Strictly speaking you should be a member of the Semitic ethnic grouping. However it seems to include Semitic people, arab speaking people and citizens of countries that belong to the political grouping called the Arab League.

There is a misconception amongst some folks in the UK that the nomadic tribes of the Middle East and North Africa are "arabs". This is not true, notable exceptions being the Berbers and the Kurds.