That, and outside the US, there is no regulations about how the horses are slaughtered, while in the US we have rules and laws regulating how the animals are killed to make it as humane as possible. Add in the travel time/length and how the animals are held prior to slaughter and the so called animal rights folks that pushed these anti-slaughter laws through have made a misery. Of course, they don't care, they just want some PR showing how much "good" they do.
I personally think they should reopen the slaughter, and put horsemeat on the books just like beef. If people want to not eat it, they don't have to. But regulate it like the beef industry and enforce the humane laws we already have.
My $0.02.