Nieghbor threated me he will start killing cats

Hello reddit, I need advice on a incident that happened. All of this was recorded between me and my neighbor . Plus I have video of him trying to run over a cat. So recently my neighbor came over to ask me if the neighborhood cats were mine . I said no my cats are inside and I just tnr the outdoor ones. He said that we’ll he’s having issues with the cats scratching his car so since they aren’t mine there is no issue with trapping them. I told him and what are you going to do to them kill them dunp them because that’s illegal. He responded that I should use my imagination on what he will do to them. So then I proceeded to tell him that we’ll if his gonna be doing that then I am gonna claim them as mine because there should be no reason to be harming the cats. He expects me to pay for the scratches on his car and said that I shouldn’t be surprised if the cats appear dead. There is more to this incident but the point is he threatened to harm the cats outside and I don’t know what I should do? Is this enough to file a police report? Please help I don’t want the cats to be harmed in anyway. This is in California.