If Islam is so great, why are so many Muslims leaving Muslim countries? And if capitalism is so bad, why aren't more people leaving capitalist ones?

Today, we see lots of immigration around the world. But generally, it is people leaving Muslim countries or Latin America for capitalist countries like Sweden, Germany and the USA. How come?

If Islam is so great, why are so many Muslims leaving Muslim countries? And if capitalism is so bad, why aren't more people leaving capitalist ones?
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