From the koran:
O ye who believe! take not the Jews and the Christians for your friends and protectors: They are but friends and protectors to each other. And he amongst you that turns to them (for friendship) is of them. Verily Allah guideth not a people unjust. 5:51
O ye who believe! if any from among you turn back from his Faith, soon will Allah produce a people whom He will love as they will love Him,- lowly with the believers, mighty against the rejecters, fighting in the way of Allah, and never afraid of the reproaches of such as find fault. That is the Grace of Allah, which He will bestow on whom He pleaseth. And Allah encompasseth all, and He knoweth all things. 5:54
In other words, any muslim who becomes a Christian or even befriends a Christian, leaves the leadership and control of allah...
So, all those islamic leaders who come to British and American Church leaders for inter-faith cooperation are either defying in the instructions of allah or they have a hidden agenda.
The Islam of the 7th century is the same today, probably under new guises as the situation demands. It is the same tactic of 'No compulsion in religion' that muhammad first adapted to Christians and Jews, that muslims are using in the Western world today.
1. Migrate to Christian areas because they are tolerant.
2. Pretend to be peaceful, friendly and hospitable
3. Begin to clamor for religious, political and social rights and privileges that you will not allow to Christians in an Islamic country
4. Breed fast there and settle down; there should be no Christian activities in your community
5. You may speak or write to discredit their religion, but they must not talk about Islam
6. Begin to expand your community
7. Christian activities should be restricted in all the places you expand to
8. The moment you have enough military might against these 'dis-believers', these trinitarian kaferis(infidel), go ahead and eliminate them or suppress them as much as you can, and be in control.
Where immediate invasion is not possible, that has always been the policy.