Procurement is the back door
Inclusion that runs one direction is establishment by menu.
Watch the public kitchen. A district, a hospital, a jail, or a city agency drops pork, then drops non-halal vendors, then calls the remainder inclusive. The meal has been made lawful for one doctrine, and that doctrine has become the house recipe.
That is not hospitality. Hospitality is an option. A single halal menu is a rule. The child who is not Muslim, the patient who is not Muslim, and the inmate who is not Muslim did not enroll in a dietary law. They were assigned one.
The Humane Methods of Slaughter Act already shows how the rite enters American law: not as the standard, but as an exemption from stunning for religious slaughter. Halal certification is the market version of the same move. First the carve-out. Then the logo. Then the contract that will only buy the logo.
The physical cut is answered on nozabiha.com. Short version: stunning is the Western welfare baseline; a conscious throat-cut is the thing the exemption permits. A gold-green stamp does not change the physiology.