Simplify the following text for a Grade 9 native English-speaking person.
Original: Jama ` at al-Muslimin ( Society of Muslims ) , popularly known as Takfir wal-Hijra ( Arabic Ø Ù Ù Ù Ø Ù Ø Ù Ù Ø Ø Ø -- Excommunication and Exodus ) , was a radical Islamist group which emerged in Egypt in the 1960s as an offshoot of Muslim Brotherhood .
Simplified: Takfir wal-Hijra ( Arabic Ø Ù Ù Ù Ø Ù Ø Ù Ù Ø Ø Ø - Excommunication and Exodus ) is a violent Islamic Salafi extremist group . The group that was founded in Egypt in the 1960s .