Ultimately there is no co-existing and there never was going to be. Wildly different cultures with mutually-opposed value systems cannot share the same geographical area and government peacefully. See also 1990s Yugoslavia, 1930s Spain, 1960-2000 Northern Ireland. As a general rule, people don't like to be ruled by an opposing culture just because the other culture holds a slight population majority; it always breeds resentment, then anger, and eventually leads to bloodshed.
Ultimately there is no co-existing and there never was going to be. Wildly different cultures with mutually-opposed value systems cannot share the same geographical area and government peacefully. See also 1990s Yugoslavia, 1930s Spain, 1960-2000 Northern Ireland. As a general rule, people don't like to be ruled by an opposing culture just because the other culture holds a slight population majority; it always breeds resentment, then anger, and eventually leads to bloodshed.