If Islam is peace then that would mean Muslims would be able to peacefully coexist with people of other beliefs.
You won't see that in an Islamic republic, and you certainly don't see it much in predominantly Muslim countries.
Hell, even in places in the west such as London and Paris you have people of other beliefs being harassed by Muslims.
Muslims main goal is to implement Sharia law everywhere they are a majority. Anyone that thinks otherwise are jaded to the truth. Period.