Or, it can be anyone who believes in their own God, as long as they are Christian or Jewish, not Hindu or whatever.

It's orthodox jews that do Kosher that have scary killing methods. We just bolt the cow and move on, they hang the cow by the back legs, then stick a knife in it's jugular and watch as it bleeds to death in pain while terrified and upside down. Then they drain the blood and inject the animal with salt water and then pack the food while praying over it.

It's forbidden for any non-Jew to touch Kosher food before it's wrapped in plastic.