Zappa, I forget that this is a new age. Forgive me, I'm old. Facebook co-opted the word 'friend'. Invisible, faceless, voiceless, uncommitted people are not friends. They are acquaintances...sort of like the old fashioned term 'pen pals'.
It's in our nature to associate with those of like-mindedness more than with those with whom we have a heated disagreement. Some choose the peaceful path of simply walking away from negative interaction or drama while others might throw themselves headlong into the fray. Still others find a happy medium and choose their battles wisely.
"If it is possible on your part, live at peace with everyone."
Romans 12:18