I guess that was their attempt to explore the Whisperer civilization. I would have thought they would have made Alpha far more vicious in her treatment of her daughter which would help explain to the viewers why Darryl felt so strongly to keep her away from her mother. At first I was scared of the Whisperers, but that episode made them look weaker than the Saviors and Wolves. I agree that their reveal to the Hilltop should have occured at night and that Alpha should have stayed with her mask on.Horrible......they took the fear out of the Whisperers.
I did like how Darryl used the Whisperers' own tactics against them to sneak Henry and Lydia out of the camp.
I guess we can expect some retaliation.