This is outrageous.
It's one thing to denounce the service of military personnel in most cases, though upon doing so I would respect you less than I would respect a hybrid of Stalin, Hitler, Himmler, and every form of cancer known to man (if that helps to illustrate my resentment), such as at a speech where, yes, it makes sense to uphold freedom of speech, but to protest the funeral of anyone, no matter what their service, and disrespect their family, friends, their life, and their person in general is an injustice to all those just mentioned that no self-respecting court should ever let slide.
If for no better reason, suppress them for harassment, and, really, infringing upon the rights of the dead to have lived his life the way he would have wanted to live it. They have no right to be so flagrantly beyond your limits.