But if your point was the "popularity" of Christianity, the figures show that it is not "popular" nor majority in most countries. And that graph didn't even include all religions, and atheistic nations. Also, "Christianity" is a very broadly defined term by the world, compared to the orthodox definition used in the New Testament.
Really, the number of countries is not a good measure anyway. Countries with small, sparse populations don't compare with countries with large, dense populations. Kind of apples and oranges.
It was a bad example (the graph), that's a given but when you compare something for popularity you compare it against each and every- you did point this out. That one had mostly the major ones because smaller ones were pointless. How about I link a more reputable source?
I used google, typed in "most popular religion" and clicked on one of the first few links that came up and got this
Most Popular World Religions
Here's a listing of the most popular religions worldwide, based on the estimated number of adherents for that religion (or non-religion).
1) Christians - 2,116,909,552 (which includes 1,117,759,185 Roman Catholics, 372,586,395 Protestants, 221,746,920 Orthodox, and 81,865,869 Anglicans)
2) Muslims - 1,282,780,149
3) Hindus - 856,690,863
4) Buddhists - 381,610,979
5) Sikhs - 25,139,912
6) Jews - 14,826,102
And...
a) Others - 814,146,396
b) Non-Religious - 801,898,746
c) Atheists - 152,128,701
It's still at the top.
Clicked second link and~
What's the most popular religion in the world?
Dear Yahoo!:
What's the most popular religion in the world?
Amy
Olympia, Washington
Dear Amy:
In terms of numbers, Christianity is the world's most popular religion, with approximately 2.1 billion followers. This includes just over a billion Catholics, about 350 million Protestants, and the Orthodox and Anglican faiths. The religion statistics resource Adherents.com hosts a fascinating pie graph that breaks down the world's major religions by population.
Third link
Major Religions Ranked by Size
# Christianity: 2.1 billion
# Islam: 1.3 billion
# Secular/Nonreligious/Agnostic/Atheist: 1.1 billion
# Hinduism: 900 million
Also the third link has a proper pie chart that's explaining EXACTLY what I'm telling you- you can't mush all /other/ religions against christianity. You have to count them singular. Christianity makes up 33%.
I do believe I've estabalished my point.