Evidence for this please? Is he sneakily planning on forcing public schools to accept Halal chicken without labels?
In any case, in the US you already eat chlorinated and battery-farmed chickens all the time, and get cheap eggs that mean millions of male chicks are gassed (or even ground up alive, which is still legal in lots of places as apparently it's so quick it's "painless") on their first day of life. Because male chickens can't lay eggs and they're not worth the cost for meat production. (They still produce meat, of course, but broiler chickens used for meat are bred differently to grow faster and produce more meat. The other males aren't worth as much.)
So the moment the males hatch, they are "sexed", tossed down a chute onto a conveyor belt, and destroyed. Do you have an issue with that? You can find videos online if you want and decide for yourself how "painless" you think it might be. The "lucky" females that survive are often kept in cages so small they can't even turn around, until they are old enough to be slaughtered to make your chicken burgers.
"Debeaking" is also a common practice to stop chickens pecking other chickens to death. This involves cutting the tips of their beaks off with no anesthetic. They never see the light of the sun. They either spend their short lives in cages or live in giant barns where a lot of them die from being trampled to death.
I agree, Halal food should be clearly labelled so consumers can make a choice. No one should be forced to eat Halal (or Kosher) food if they don't want (or know).
But countless chickens are already slaughtered every day and raised in inhumane conditions. Are you protesting that too? Halal rules just mean they're supposed to follow some basic animal welfare rules and execute them quickly with a sharp knife to drain the blood, instead of, say, a bolt to the brain as they do with sheep (neither system is perfect when done quickly and on a mass scale and animals suffer in both systems – when done too quickly or sloppily, some animals survive the bolts and are still conscious later on; or, in the Halal system, the knife may not be sharp enough or it's done too quickly and again the animal suffers). After that they're supposed to say an Islamic prayer or something. Arguably no worse than what already happens. Do you question where your food comes from every time you go to McDonald's or KFC?
Unless you get your eggs from a local free-range farmer, this happens every time you buy eggs.