Seems like nomatter what I change, the zombies attack eachother over prioritizing a player. 

Do you have in the .json file at line 333. Ignore entities scarecrow?

"Ignored entities (full entity shortname)": [
      "scientistjunkpile.prefab",
      "scarecrow.prefab"
    ]

Yes it looks just like that , i did not edit this part of the config

robfruin

Yes it looks just like that , i did not edit this part of the config

same here, decided to give this a shot again but all they do is kill each other
edit; i fixed this issue with better scarecrows