LOL, I'm sure.
European 1 - "Hey i've got a great idea. Lets give up those rights we fought for over the last 300 years and start basing our value system on sucking up to an invisible man again".
European 2 - "haven't cultures based on sucking up to invisible men failed miserable for thousands of years"
European 1 - "Yup. That makes them long overdue to succeed"
As far as birth rates, once a country obtains competent prenatal care they stop having 5-7 kids per person. Muslim countries are no different. Muslim countries with competent healthcare like Jordan have birthrates not much different than Europe.
There is no way we'll go to war with N. Korea. They have a hostage situation going. If anyone moves on them they'll start firing artillery shells at south korea and destroy Seoul, which has about 10 million people on it. I think US weaponry can destroy artillery pieces after the first shot is fired but there are still 10s of thousands of them along the N/S korean border. So that is still 10s of thousands of shells that could be armed with WMD. Plus they have a massive suicide commando squad of 200k soldiers willing to do terrorism, suicide missions and assassinations overseas. The price of war is just too high anytime soon.