The faith Mohammed taught does not just hope that the world will become Muslim. It wants all human society and politics to be governed by religious law: it draws no distinction between the secular and religious sphere (except to condemn the secular). Therefore, Muslim leaders find it very difficult to resist the hotheads who say that Sharia - the divine law - should be imposed wherever possible.
In addition, the religion is absolute in its attitude to particular bits of territory. It is forbidden, for example, that any other religion be practised in the Arabian peninsula, because that land is considered sacred to Islam. Therefore, it is hard for a "moderate" to oppose the second-class citizenship of Christians or Jews in Muslim lands, or to say that "infidels" fighting in Muslim countries should not be murdered - even when they are his fellow citizens in a Western country.
When someone like bin Laden says that Islam should confront the "Cross-worshippers" and the "Zionists", he is making a claim in which politics and religion dangerously reinforce one another - a claim which most Muslims might not like, but which most of their leaders cannot find quite the right words to resist.
I find I am less trusting than I used to be. We don't hear much on the news about hte Islamic communities disavowing the actions of the so-called "radicals." Is that because they actually agree with them? Where are the protests to discourage more?
I'm very disappointed in my Muslim friends. We are in the grips of international terrorism and they don't condemn the perpetrators. Could it be they want the rest of the world to succumb? Is, "Convert or die!" once again the Islamic mantra?
I really worry about it.