Are you familiar with the saying "You can't teach a pig to sing. It wastes your time, and it annoys the pig." I think the same thing goes with folks who want to debate the issue of butchering the animals you raise yourself. It's just wasting someone's time & annoying someone else.
Personally, I've had some good discussions with folks who wouldn't/couldn't do it themselves, but are impressed that we can. They will listen to us explain our rationale but won't make criticisms or complaints. Perhaps they think its wise to stay on the good side of someone who is handy with hatchets for decapitations and knives for slitting throats. Perhaps they don't want to alienate the folks they may one day need to supply them with meat if ever there's an emergency.
If your friends & neighbors are that sensitive to the issue of home-made meat then I just wouldn't discuss it with them. If they don't want to try it then fine, that's just more good meat for your plate. If it's family, especially those getting together for a holiday, then agree to disagree & find a compromise. If there are enough willing cooks, then prepare & serve both kinds of birds. If not, then serve the kind that most people want and make sure there is something to sustain the dissenters.
This is just an unfamiliar topic for most folks in our modern urban society. We are very disconnected with our food sources and tend to push unpleasant realities to the fringes of our awareness. Much of our food comes pre-made, processed, pre-packaged and often bears little resemblance to its origins. The whole foods available are also often pre-cut, washed, wrapped or bagged and many people have no idea of how they were grown, if it's the seed, leaf or root of the plant, if it grows on a tree, bush, vine, or underground. Many people now buy their meat pre-cooked, in addition to being pre-packaged, cut, cleaned & killed for them. So there may not even be any blood left to remind them that they're eating the flesh of a once-living animal.
Just be grateful you're able to appreciate life on a more genuine plane, and try not to worry about what others think about it.