*sigh*
Corrections for some....
"Islam" has as much right to exist as Christianity. All terrorists are not Muslims, nor are all muslims terrorists. By the logic that something has to be 'done' with Islam, then something must also be done with Catholicism and Protestanism.... or are the Irish terrorists Muslims? Religion is not responsible for terrorism, idiotic fools are.
Islam is not 700-800 years younger than Christianity. It began becoming a widespread, well-known religion at around the 8th century A.D. (I don't intend to use the overly politically correct 'C.E.', or Common Era), but it's roots take it back several hundred more years.
Christianity is, for all intents and purposes, an extension from Judaism, not the other way around.
The Jews did not believe in hell. Nor do they now. Or, more precisely, the Torah (which is basically the Old Testament) makes no mention of the Christian Heaven or Hell. Neither does the Old Testament. There is mention of Heaven as the Kingdom of God, but not that it's a great reward for leading a virtuous life. When Soddom and Gomorrah were destroyed, there is no mention of their souls suffering eternal torment. Satan does not exist in the Torah, or the Old Testament. Go ahead, check, I'll wait. Oh, the serpent? Well, it never says he's the devil, does it? All it says is that the Serpent tempted Eve with the knowledge to be as God. God was pissed off because, and I quote, "Thou shalt have no other gods before me, for I am a jealous God."
The concept that religion does not belong in government is understandable, based on our currently secular society. However, our secular society has absolutely NO right to dictate to the rest of the sovereign world how they may govern themselves. Also, why aren't complaining about Vatican City? It enjoys legal status as a separate nation, governed completely by the Pope. It has one of the most well-trained and well-armed security forces in the world. Imagine what could happen if they were unleashed in the middle of Rome. Shouldn't they then be 'dealt' with, as well?