It may be hard to believe that anyone who calls himself a Horsemen in the tradition of our beloved Thoroughbred trainers, breeders and owners could throw fellow Horsemen under the bus, but that’s what the irascible and inscrutable Billy Lagorio just did in a recent letter to the Massachusetts Horse Racing Committee where he begins by opposing a reduction in the Thoroughbred industry’s share of the Race Horse Development Fund before taking his bus on a mad rampage.