Perhaps lack of empathy is greater then I first thought.
Just because something would make you unhappy, does not mean it makes all unhappy. I love beacon, it is an awesome food product that is easy to cook, goes well by itself or as part of a larger meal, and makes a satisfying sound as it cooks. Yet others do not eat beacon, and I'm sure their waist lines thank them for it, and knowing that they have the willpower to resist this fatty temptation makes them happy. All that without even having to start to go into historical or religious practice. Should I pity those who are missing out on my hammy treat, just because they are too lazy to work it off afterwards because 'modern society has brainwashed everybody into watching tv in their free time!!!', or even worse, then refuse to eat it because 'Their god will smite them for eating he's beloved piggies!!!'. Well no, not really, I should just accept that they do not eat beacon.
Just like some people wear specific clothing or preform specific rituals, or hold things in higher priory to other things.
This becomes some what of a problem, however, when people not only understand that we all have choices, but try to enforce their own on others. Have you ever heard somebody say to another, or yourself, that they (or you) are going to a specific hell for not worshipping a certain god? They are trying to scare you into compliance, a tactic often refereed to as 'terrorism'.