The whys and wherefores of the method of execution are secondary, I feel, to the issue of openess and honesty.
The providers are probably of the opinion that if we (that is the non-muslim population)
knew the meat was halal, we wouldn't buy it. So they "lie by ommission" to protect their profits as it's cheaper than providing two seperate lines of produce. Not that we'd know which was which if they switched labels anyway!!!
As I have said before ( and no doubt will again

) I will accept the allowances we are all forced to make to muslims and non-christian faiths (bearing in mind we are a supposedly Christian Country) when I can walk down any High Street in Saudi swigging from a bottle of vodka with a bikini clad women on my arm and for that to be acceptable to the indiginous race!
I suppose I should now also be taking bites, between swigs, of a beef sarnie, where the beef was killed according to british slaugter codes, bought in a local Saudi supermarket
.... ain't gonna happpen !
I might add I have no problems with whatever religion anybody is. I don't
impose my thoughts and beliefs on them and I expect the same courtesy in return.