The difference between Christianity and Islam is that for the vast majority of Christians, Christianity is a belief in belief, while for a lot of Muslims, Islam is an actual belief. Hence the difference in how they treat and react to their respective holy texts.
Yes.
Why is that our problem? Why should it be? Fuck your neo-White Man's Burden.
A snapshot of French history paints a geographical zone in which a multitude of cultures, languages, and tribes flourished. Even now, it's home to at least ten languages, despite the efforts of the Revolution to
homogenize the country and cause it's rural (and some urban) peoples to call it a nation. These cultural islands weren't fully incorporated until well into the 20th century.
The same can be said for Germany, and a number of other countries, all characterized by dozens if not hundreds of tribes that coalesced into a single peoples following a history of migration, emigration, and contact with other cultures- whether one beyond the next hill or across a sea.
Your world is a result of this, and you no doubt depend on it to read this text and enjoy your meals.
China, by contrast, was fairly unified by the 14th century, and even though they arguably led the world in technology, circumstances allowed a few despots to
suppress that innovation. Note that it happened again during the cultural revolution. It's probable that a mix between disunity and unity is optimal for growth, and this balance requires constant competition and exposure to other cultures, facilitating an exchange of ideas. Sure, we have the internet, but that's not quite the same as living in a space supporting a multicultural melting pot.
My point is this: we all appreciate equality. individualism, competition, and liberty.
It serves our purposes to convince others to embrace these ideals, since we no longer live in a world that allows for direct colonialism and other obvious means of exploitation. You want neighbors you can reason with, after all, and it's easier to do that when there's an exchange that positively affects you.
This isn't motivated by guilt; it's simple self promotion.
The more people speak English, the easier it is for me to sell them tickets to Batman movies. The more Muslims practice their religion like many Christians practice theirs in developed countries, the easier it is to predict, interact with, and profit from Muslims.
Also, can only men with lighter skin tones have 'white man's guilt'?
Molly: figure out how to screen potential refugees for adaptability and willingness to get assimilated. Give these subjects priority. Unfortunately, this discriminates based on class. All developed countries already do this through education requirements, though, so there you go. In the end, Xant was right about any nation's view of other citizens: they are not valued as much, and they couldn't afford it even if they did.