Multiculturalism
Conservatives get agitated about multiculturalism, but it is not the problem. Multiculturalism is a fact of life. Every nation has multiple cultures. Multiple cultures are normal everywhere, except in a local community.
The problem is democratic nationalism, which puts the majority culture in charge of every other culture. That is asking for trouble. Especially when the majority culture changes.
People who complain about multiculturalism are usually from a minority culture. They are complaining about their culture being squeezed by the majority.
When the majority culture complains about multiculturalism, they are usually upset, because the minority will not submit to their dominance.
Christians are big complainers about multiculturalism, because they used to be a majority culture, but are not just a minority one, and they are finding the adjustment painful. They are discovering the disadvantage of being a minority culture under democratic nationalism.
The problem is not multiculturalism, it is a fact of life. The problem is nationalism, which forces everyone to come into line with the rest of the nation. The solution is to get rid of nationalism and the nation state.

