abandonment

Following from Part 2 There was a brief detour and respite for Ishna outside of traditional religion when she immersed herself in the classical philosophical tradition of Stoicism. No other spiritual material had moved her as much as Gurbani had, until reading the work of Roman Emperor Marcus...

Alright, I am just wondering whats Sikhism reaction to Apostasy, because I heard that for Islam that they kill those who leave their faith? I know that Sikhism doesn't do that, but what do they do when someone leaves their faith? Also, I am not leaving Sikhism I am just wondering.