The Islamic system does not permit uncontrolled capitalism, requires fair financial transactions, is pro rights for both rulers and the population, enforces Zakat (alms tax / a form of wealth tax).

Neither does Christianity, but you really wouldn't really know that by observing the practices of so called Christian Nations™

The middle east has the largest concentration of billionaires outside of US/China and huge poverty alongside. It is so grotesque that the rich will often just kill people and casually pay blood money.

Begin a billionaire is not inherently unethical. It's about how the money was acquired and how it is spent. This notion that it is evil is mainly a western one.

That certainly explains the flood of migrants from the West to the Middle East and North Africa.

If you're being sarcastic, yes lots of westerners are in the region because of lower taxes and other benefits. Otherwise, correlation is not causation, much of the situation there is because of the fallout of western colonization, including Islamic principles being not fully applied there (the west is behind a lot of it), and the usurious financial system.