I see what icehorse is trying to say and want to agree with it. However, this is a far more difficult point to argue than it seems.
"Inherent Rights"
Some people lay claim to "inherent rights" or "inalienable rights". While I want to support this concept, there is actually little support for it other than just simply asserting that people have them. Some religious people may claim that these rights come from God, but that's a problem when you consider that not everyone believes in the same God in the same way and a decent chunk of society doesn't even believe in God. In our pluralistic society, this doesn't really fly. Likewise, some secular people will argue that these rights are inscribed in a country's constitution. But if the constitution is subject to democratic change from time to time, then these rights are by definition not inherent. Constitutions may not explicitly mention certain rights which ends up jeopardizing them as our societies and technology changes over time. So this isn't practical either.
Democracy
If there is no such thing as "inherent rights", then that means that our rights and freedoms are a purely legal construct that is subject to the whims of our political system. Obviously, in most of the West, that would be democracy. We run into a little bit of an issue here. Let's say that over time our societies change and we no longer support freedom of religion. The majority vote to remove this freedom from the constitution and it is done. Is this right? Most people would probably argue that it isn't right, but if that's what the majority of the people want, then we have to come to grips with the fact that either a) We really do not support democratic rule in all cases, or b) Accept that "inherent rights" do not exist and allow oppression to occur in the name of democracy. Since Option B isn't palatable in most cases, then we must accept Option A.
Constitution
If we accept Option A in that we do not support democratic rule in all cases, we must then accept an institution that will be unchanging in the face of public pressure to the contrary. However, this will inevitably lead to civil unrest if people cannot be governed in the manner they choose. Civil unrest typically leads to more government oppression as it attempts to bring law and order back to a society. Basically it boils down to an option of either oppressing minorities or making the majority discontent.
Multiculturalism
When most people think of multiculturalism, they think of sharing cuisine, art, music, movies, and languages. While sharing these are generally-speaking unobjectionable, the people bringing their recipes for wontons, curry, shawarma, pizza, or borscht also bring with them other cultural values, some of which are completely incompatible with our own. There is a strong economic argument for multiculturalism, however there is no reason we can't have our cake and eat it too.
Immigration
We need an immigration system that filters out people who will not be compatible with our society. That is, those who do not expressly agree with all the core values. Admittedly, this can be a rather difficult task at times. But if the majority are on board with the whole idea of freedom of religion/speech/press, etc., then we have a greater chance of avoiding both oppression and civil strife. While granted there are some native-born people who oppose these ideals, in part or in full, they do have a right to express them. However, as a nation, we also have the ability to not allow people to enter into our societies who will not fit in and who do not agree with it. In the West, that means accepting more immigrants from North America, South America, Europe, and Oceania. And while I'm not saying we should completely shut off immigration from Asia and Africa, we should simply scrutinize these potential immigrants more, knowing that there is a good chance their values are not compatible with ours. When we allow people into our societies, it is with an implicit understanding that they will work to help build them up, not tear them down. If there is a massive influx of people in our backyards demanding Sharia law all of a sudden, the fault is our own for allowing those people here in the first place. We should not. We should embrace multiculturalism, but not at the expense of admitting those in our countries who oppose our very ideals.