Sorry if I jumped the gun there, 03, I don't have any actual experience to back this up, but I was under the impression that, as ghost said, a cemetery is technically private property, and therefore the protestors have absolutely no right to be there. I realize that this kind of thing has to kind of stick in an LEO's craw (I remember seeing an episode of COPS where a KKK demonstration was being protected by a force that consisted of about 50% black officers), but at first (and second) glance, it seems like the police chief in question is taking this a bit far. Isn't it also his obligation to protect the rights of the family?
And how hard would it be for the officers to get distracted by a commotion on the opposite side of the cemetery at a key moment?