That's because we in the west don't have faith in Christianity and it gods
Over the past 400 years the Western world has gone through or is going through dechristianisation
It's hard for us to understand what it means to believe in a higher power
It's also bakes the question what will happen when people's from religious backgrounds move to those countries
And they naturally will start to want to have a say in how the country is run
That's unless they themselves go through the decline of their own religion which is very possible