The DPS are in the wrong here. Just because the tank is new is no excuse to pull everything for a "fast" clear. The healer also saying they were wrong only reinforces it; tank had no shot to even attempt to tank, and I feel its fair for the DPS to be called out for their poor behavior.

This kind of behavior is what discourages new tanks. Considering I'm hearing healers are having queues in dungeons again, I'd say this is something we should avoid...