I was saying that to my wife after the episode too. First they go through an unimaginable holocaust and the only thing that keeps them going is the promise of a new home and a safe haven from the Cylons. So they could probably numb themselves to what happened...at least a little. Then they finally get there and they all have this collective sigh of relief and joy only to have it turned to ashes. Now everything they've been holding back and numbing themselves to just comes to a head and they now have nowhere to go. Very sad, and I'd think very realistic under those circumstances.
Chris