I thought about this some more and realized a possible reason for the lack of timely and useful LE response. He is not merely a "trespasser", assuming that he has in fact been banned from the property in a manner consistent with PA law. That will not get a rapid response, and may not get one at all, depending on call volume and priorities.
What this has to be described as is an armed trespasser with mental problems, likely Alzheimer's, who has threatened persons legitimately present. That will get a response. HOWEVER: such an event has a high potential for (legitimate LE) violence. MH patients are sometimes far enough off the mark that they don't understand who the cops are and what they are doing, and that non-compliance will end badly. The only significant resistance I have encountered in LE has been from mental patients, and for exactly that reason. (Similarly, I have had some struggles with juveniles in court during my seven years as a juvenile court prosecutor in this state. Same sort of problem - they get agitated over what is pretty insignificant and have to be restrained, leading to a carpet therapy session. Only one adult offender presented that sort of problem during that time, and the most of 4 years in felony court since - this is two counties, since 2000.)
LE works on a straight forward path: ask, tell, make. The first two generally won't work with a mental patient, and then it all goes to Hell in a handcart. Add in the specifics of this fellow's behavior, and it is not hard to see a really bad outcome. Unfortunately, that sort of outcome involving a club member is already really easy to foresee, even worse, and completely unacceptable. (And yeah, it would be unfortunate if he ended up as "Swiss cheese", but that would not mean it was not justified. The legal standard is "reasonable" - not perfect, or even correct, when it comes to use of force. The facts as perceived by responding officers are all that matters - this old fellow's many productive years on the planet, and the perceptions of his friends and family have no meaning.)