re: Police are under no obligation to protect you from harm

I do believe the premise is incorrect. However, some of the cases you cite do surprise me. I could see how the language could be extrapolated to mean what you say...though I don't think any of the cases cited apply to San Jose. That's the perfect case for the courts to decide, though. Police were present and witnessing attacks. What are their duties in that situation? The 9th circuit and maybe the scotus will weigh in im sure.