The premise needs no deep dive, no reasoned understand or complex treaties, this is simple.
Islam’s entire ideology is based on submission, forced when required, it allows not freedom outside of the satanic verses it lives by.
Christianity allows freedom and choice, even when that choice is to deny God.
Or Constitution is written with those Christian chronicles.
Therefore are constitutional government in diametrically opposed to the ideal of Islam and 100 percent incompatible.
There can be no co-existence.
If asked to negotiate on the flavor of an ice cream one party insists they want to add poop to it for the flavor, who in their right mind would compromise on that? How much poop is acceptable!~
chronicles = principles
Sorry typing bad