Difficult to achieve.
Muslim lands are full of western backed dictators. Example Trump decides to ban poor Muslim countries, if he had the balls, he would have banned Egypt, Saudi Arabia, Kuwait, Bahrain, UAE, Oman, and Qatar. The African Muslim countries still pay colonial taxes (slavery taxes) to France and others.
I'm all for your opinion that Muslims should leave, but in order to achieve that the West needs to stop supporting these dictators (recent example Sisi of Egypt coup) and have to remove the US/Petro dollar clause. We need fair dealing. You want energy, you will buy it with gold, not worthless paper money. Fair compe ion is required for your plan to work. Without fairness, you cannot rebuild any society.
I do agree that Western Muslims are hypocritical, but some of them have nothing to go back to because of the reasons mentioned above.
Sidenote: US war against ISIS is strictly due to the fact that ISIS wants to sell oil for gold. US don't give a damn about chopping heads, their biggest ally (the Saudis) chop heads constantly.