The sentence "Come on guys lets be friends now" originated from Counter-Strike: Global Offensive. its a sentence you say after bullying someone, and when they talk smack back to you you say that sentence. its basically a way to play victim when you are obviously in the wrong.
PonyRider2002: hey leon you fucking suck at the game hang yourself
Leon: hey why would you say that?
PonyRider2002: come on guys lets be friends now