The pork thing doesn't work that way.
It's only bad if they willingly and knowingly CHOOSE to eat it. If they're starving and the only options are death or pork, they can eat pork. If you feed them meat and they don't know it's pork, they can eat it.
I once had a muslim roommate who always asked me not to tell me what kind of meat was in the food I was cooking, so he could eat it (I often cooked for multiple people).