I agree absolutely about the irony, nightowl, and more than that: the unfairness of such a law. Quite apart from the humaneness issue, it is wrong to have different laws for different groups of people in the same country and for that reason alone we should be opposed to the current law on ritual slaughter.
With regard to my "less than human" comment, what I'm thinking is that millions (possibly billions) of people throughout the world do not have the luxury of being able to care where their food comes from. The same applies to other animals who eat what they can forage or hunt for. Even in Britain, people relying on foodbanks, for instance, and other people surviving on low incomes do not have the luxury of being able to care where their food comes from, how it is produced, or even what it comprises.
I'm not arguing that those of us who do have this luxury of choice should not use that choice humanely and wisely, nor that such an approach isn't to be desired for everyone; I'm only arguing that at the moment it is unreasonable to expect it of everybody. So I would not use the expression "less than human". Clearly, it isn't less than human because lots of human beings do not have the choices we assume here.