Reality is nowhere near as simplistic as you pretend and your "two groups" construct is a good example. You would be entirely mistaken to claim that I am a part of either of your supposed two groups. I firmly believe that animals should be dispatched as quickly and painlessly as possible. However with crabs, lobsters, and possibly turtles that may include dropping them into a pot of boiling water as that seems to be about as instantaneous as it gets for them.
Diet is an entirely different subject and not one I am really interested in discussing here other than to say that I believe that anyone that would allow children to starve rather than feed them doesn't have much claim to being humane.
There are millions of children who grow up to be healthy adult on balanced vegetarian diet. Just because you are not eating pork (or any meat) does not mean you are starving. Your logic is bizarre and gives an impression that you are deliberately trying to be disingenuous.
Are there millions?
I'm not disagreeing, but I do wonder if there are millions of adults who were raised on a vegetarian diet. It is not all that common, and certainly was less so in the past (when such adults would have grown up).
75% of India's population is vegetarian. That is millions right there. There could be more countries like that.