Replacing Christianity with Islam

[Wyrd of Gawd]

The question is really the King Asa problem.  When there are different religions there are conflicts.  So simply get rid of every religion except one and there will be peace.  It really doesn't matter which religion is the survivor as long as it is the sole survivor.  And everyone will have to follow the specific denomination of the surviving religion.

That's not exactly what Voltaire said:

“If you have two religions in your land, the two will cut each other’s throats; but if you have thirty religions, they will dwell in peace”

― Voltaire

Voltaire didn't know his ass from a hole in the ground.  He only had to cope with Catholics and Protestsants. They had tried to exterminate each other.  Look at current events.  Things haven't improved with more religions in the neighborhood.

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That's not exactly what Voltaire said:

Or, y'know, just remove religion from the equation. Level playing field for all and nobody being able to get away with bullshit because everyone else will be too skeptical to fall for that crap.

That's still the King Asa solution but without the religion.