Total world population of christians: 2.1 billion.
Total world population of catholics: 1 billion
Total world population of eastern orthodox: approx. 400 million.
Total world population of "restorationists": approx. 30 million.
Total population of "mainstream" christian churches (Anglican, Lutheran, Methodist, Reformed and Presbyterian): approx. 200 million.
That doesn't leave much evangelical and fundamentalist christians. My list also leaves out liberal and progressive christians, christians who practice exclusively a form of mystical christianity, and christians other than restorationists who claim christianity but do not adhere to traditional christian beliefs (such as christian scientist, christadelphians, iglesia ni cristo, messianic judaism, etc.)
The loudest christians in the US are the ones who belongs to the sect with the smallest numbers. Now, if you consider that only about half of all Europeans are catholics (I'm not sure of the actual number), realize that Anglicanism and Lutheranism are two of the largest protestant churches in Europe, that the predominant form of christianity in Eastern Europe is eastern orthodoxy, and that most Europeans are quite secular anyway, you're premise that the catholic church will "take over" Europe seems quite preposterous. Christianity in Russia is divided between eastern orthodox, baptist, and adventist, with the vast majority claiming eastern orthodoxy. So the catholics don't have that much of a claim to Europe, and probably wouldn't want to take it over in some sort of coup anyway. There's only a few million (hundred million?) Jews, who aren't that interested in world domination. Most Muslims are not affiliated with terrorism. Although Wahabi and Salafi sects claim to be Sunni, the largest sect in Islam, with approximately 84% of all Muslims claiming to be Sunni, most don't agree with their acts of terrorism. Most Chinese are Buddhists, who believe in not harming any living creature at all, so I'm not sure what your beef with them is. The government is communist, but the people don't really believe in communism as any kind of real philosophical proposition, it's just what the government is. They just want to live their lives. So this amounts to paranoia on GBM's, and RR's, count. There is nothing to fear but fear itself, and the RR idiots are overflowing with it.