In my essays on pages ADI and BAR I discuss the problems that Islam has in this modern age. It is my assumption that all men of good will (Christian, Jew, Muslim, and others) would like to see the problem that this world-wide faith has with its neighbours, resolved amicably.
My suggestion is that some world-wide body (such as the UN) set up a "Commission of Conciliation" where the host body nominates a chairman (perhaps a Hindu) to administer a set of discussions with notable Christian and Muslim scholars. This Commission would act as the spokesman for declarations of intent as to how the two main religions would live in harmony. It would be this Commission that denounces lesser bodies and individuals that do not want dialogue.
The Commission would need at least one sub-committee who would represent only the Muslim opinion. It is possible that the Vatican could be the sub-committee for Christian opinion. I am aware that there are at least two main strains of Islam, so it would be the job of the sub-committee to resolve their differences before presenting a combined view to the main Commission. Similarly, it may be necessary to involve nonconformist Christian denominations to get an agreement on what is put by the Christian sect to the main Commission.
I would see that New York would be the best home of the Commission, as this is the city that most closely appears to be the centre of the universe.
I have not touched on the subject of enforcement. I would suggest that this should be left until a later date to see if it becomes necessary. It may be that the simple authority of the Commission would stifle any serious revolt against the decisions of the Commission.
Now, if it turns out that the Muslin group are simply not willing to engage in dialogue, the prospects for the Islamic faith are dire. However, I believe that there are enough Muslim scholars who genuinely wish for peace, that this possibility is highly unlikely. One of the reasons that I do not believe that there will be an out-and-out rejection of the idea by the Islamic world, is that there is enough common sense in that community to know that a full-blown war between Christianity and Islam can only have one outcome. My ten months working in Syria taught me that the West will most certainly be the out-and-out winner. The words "snowflake in Hell" come to mind.