Yes, the beginning was inspired by the movie "The Purge". 5:04 Where all the massacre happens they are in Zamagna, a street of Zona 7 / San siro district (You will already know that Seven 7oo comes from this)
Funfact: The guy you see at 5:30 with the purple sweatshirt represents Shiva (Rondo's opps) in fact if you go and watch the video "Shiva - Take 3" you will understand why