As this a board for tourists making a cruise, tell me what ship that man in Mazatlan sailed.
If you want to report every murder in Mexico fine, but then publish also those murders commited in the USA, Europe, Canada, Australia etc. That way you will see many more places in the world have problems, not just Mexico.
Whether you believe or not that there are plenty of people that just like to go and stay in Puerto Vallarta and other places (thousands that stay there in winter, many others choosed to live there fulltime), is your problem not mine.
I know better and will return there soon for another lovely stay.