There was a middle eastern restaurant next to my work. Used to go there until I found out what halal meat actually was. Prior to that, I always thought it was just blessed by a cleric, not this. They'll never get my business again. Bashing the animal's skull in with a hammer is more humane. You can see the terror in the cow's eyes. It's being allowed to suffer. This is savage, but what do you expect from a culture that views stoning as an appropriate method for killing humans.
Yes, kosher is done the same way. Pays to educate yourself.
I remember hearing about the British meat industry being near exclusively halal due to economic reasons. MPs at one point wanted to force manufacturers to label it so consumers could choose. Not sure if that passed.