After the 9/11 attacks I told everyone that the next big war will be the Muslims versus the rest of the world.
That could easily be avoided if the leadership of Iran was overturned in a coup with them being replaced by a moderate government having free elections and not supporting every terrorist group in the Middle East and beyond.
Countries like Syria would also have free elections as their leadership would no longer be propped up by Iran and Putin would no longer be able to use Syria as a base for his navy etc.
We would get a new world order and there would no need for illegal immigrants to come to Europe as everything would be stable in their countries.