Note that "religious meat" can be cruel for certain animals as well. Chickens are still a quick stun, IIRC, but cows are brutalized - they basically slowly drown in their own blood, because of the way they are slaughtered to be Halal.
And then companies try to push for more Halal meat, because there are fewer rules to account for, when it comes to Halal (great way for them to skirt the law, legally). The chicken supposedly tastes better, though.
The only reason it tastes better is because its not factory farm sourced in the same way and youre closer to the slaughter date when consuming it. Massive suppliers control the entire chain including slaughter. Halal suppliers or live chicken suppliers tend to be smaller operations.
Should be banned. Too bad European countries are bending over backwards to accommodate just as backwards beliefs.