Don't work for the group, see the people and work for them.
When you're working in a group there always comes a time when one bad person ruins it for you - they do or say something that reveals they aren't who you thought they were and you realise you may have been backing the wrong horse.
They don't deserve your contribution or your support, and since helping the group means helping them, you become disengaged and this is the start of a downwards spiral that will only end with you leaving.
A group will disappoint sooner or later you because it contains at least one bad person. Don't work for the group, see the people and work for them