It's supposed to be a safe environment in a support group, it sure doesn't sound like it was safe for you to voice your opinions.
We've been through so much, all of us weary parents, I'm sorry you had to go through that on top of having to deal with your difficult child too.
Perhaps quitting that group and finding one that is supportive and understanding and open to different views..........and making sure you are very kind to yourself now to balance out what happened to you last night.
