Halal is more than just the content of the food, you can have beef that isn’t halal.
The animal has to be fed and given water before killing, has to have a prayer given, and has to be killed by cutting through the neck outside of the view of other animals.
That can backfire and then you get a retarTed Talk about how their viewpoint is the right one.
I just say “Bless your heart.” and walk away. Works best when talking to northerners because they don’t know what that means.