Fair punishment?

My daughter is 6 years old and she has been picking up some bad behavior from kids she plays with in the neighborhood. She is very impressionable. Usually when she acts up I can sit her down and talk to her about what she did wrong and we talk about how next time she can do things the better. Lately her attitude has gotten much worse and she refuses to listen to me. Today she was throwing toys against the walls in my office area and I asked her to stop and told her that she needed to take her toys back to her room. She immediately starting screaming and saying she “didn’t want to” take her toys to her room. So I walked over, turned off her tv show, picked up a toy and was about to take it to her room. She pushed me and hit me in the back. She had a whole fit and threw herself on the ground trying to kick at me. Her dad comes down the stairs, picked her up and popped her once and made her go to her room. He then went on to lecture her for 3 hours and he took every single toy out of her room. All of her toys are now in trash bags in the garage. Her room is empty. All she has now is her dresser, clothes and her bed. He even took away her nightlight and her unicorn blanket and just gave her a plain white blanket. I agree that she needed to be reprimanded for her actions, but I feel like he went too far by taking away literally everything from her. I’m not sure what to do from here. Is his punishment too harsh? He said she needs to learn respect and to know not to hit me and to not throw her toys against the wall. I just have a soft heart and I love my kids more than anything. I have always been a bit of a pushover and I’m very gentle when it comes to getting onto them. Again, is his punishment too harsh or am I just being soft?