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.
Therefore the question is incomplete. It would be better if it was: "Should all of Christianity and Islam be replaced with which one of the sects and orders of Islam?" and then list them.
https://www.quora.com/How-many-different...-are-there
http://www.bricktestament.com/king_solom...09-11.html 6 pictures
Therefore the question is incomplete. It would be better if it was: "Should all of Christianity and Islam be replaced with which one of the sects and orders of Islam?" and then list them.
https://www.quora.com/How-many-different...-are-there
http://www.bricktestament.com/king_solom...09-11.html 6 pictures