Because their aim is to expand the Islamic Caliphate to the rest of the world and crush the Infidel. They could care less about their own sh!thOle countries.
It's all about their real agenda for world domination.
They are immigrating according to and emulating the long time Muslim doctrine called Heigra which derives from Muhammad's flight (immigration) from Mecca to Medina where he became a warlord and finally achieved success. He preached in Mecca for 13 years and was nothing but a failure
The Hegira or Hijrah (Arabic: هِجْرَة ), also romanized as Hijra and Hejira, is the migration or journey of the Islamic prophet Muhammad and his followers ...