I recommend you let a few weeks or month go by. Then send a personal messages to Gabby and Drew. To Gabby say you miss her on the group and make up something to defuse her anger for Drew like he did not intend to be offensive. He wrote without thinking thru how others might take it. To Drew say we had to act swiftly because Gabby was so offended. I only say this because it sounds like the group is much more than Facebook personas. You actually shard experiences like Santa Cruz. Such friendships should not be broken when words are spoken passionately in haste. Be the unifier, the healer, Not the one with thumbs up or down. Time heals wounds.