I mean the title question would be super illegal. The thing he did is probably fine if its in a bag and especially fine if he didnt hit anyone with it.
I propose we pass a law that officially makes "he needed killin' " a legally admissible affirmative defense. If you can prove to the jury, beyond a reasonable doubt, that someone just needed killin', you can't be convicted of murder.
I'm sure this won't have any horrific negative side effects whatsoever...
Don't be so sure about that, consider that raw chicken will be a good carrier for diseases. On the other hand, if those christians aren't vaccinated they would also qualify for this.
Throwing something at a person is battery, pretty much everywhere in the US.
You could also make an argument that it's "discharging bodily fluids" or some weird kind of "disturbing the peace" type of offense predicated just on disturbing other people around you, but it definitely would be battery.