Actually I don't think the Russians should be blamed for what they did to the whermacht. Besides its only a fraction of what the whermacht did to the Russians. The country who suffered the most seems to be hated the most and I don't know why. If anything blame the soviet government not the average citizen.

It was the whermacht who attacked them first. The whermacht's priority was to kill as many unarmed civilians as possible as to destroy the morale of the red army. The red army was only punishing the whermacht for killing their children.

The whermacht basically declared war against civilians, not the military. A majority of the whermacht missions involve going into house xy and killing the wife and kids of mr. A and Mr.B and then the whermacht compete against each other to see who can kill the most and then go home and excitedly brag about how much more they killed than their comorades. Hospitals, nursing homes and retirement buildings where the favorite targets of the whermacht. The whermacht motto was "civilians first then military". Basically the whermacht always try to kill all the civilians before confronting any armed force. Most of their tactics involve evading armed forces and go directly towards hospitals, schools, retirement centers, clinics and nursing homes. The most favorite target of the whermacht.