It'll take a couple of generations. Starting raising your kids on only Soylent Green type modern foods, and no meats; then, they'll grow up to find real meat disgusting.
Or the first time they have real meat, they actually enjoy it. Similar to all of those parents that regulate their kid's sugar content by not allowing sodas/candy/etc. Once they go to a friend's house or school and get a taste, they do not spit it out in disgust.
Funny enough, this happened to me, I was raised without meat as a toddler very young child, tofu dogs, seitan, the whole nine yards. My parents from the Bay Area were militant about it...until I was about 5 at a family friends bbq, I had bacon for the first time, and as my dad tells it, that basically ended the whole family's vegetarianism it was so good. We all eat meat till this day... so maybe there is something instinctual about it.
Meat is rather different. Just about no kid in America would want to eat a dog. And there's nothing significantly different between a dog and a pig, other than our cultural attitudes towards them.
As disgusting as I've been raised to find the idea, I suspect GP's point might hold have a grain of truth to dog meat, too. Some cultures eat dog -- I suspect if I ate dog meat, especially if I didn't know it was dog meat, I'd probably find it an okay meat.
(that said, I don't believe the physiology of domestic dogs really lends itself to "good meat", certainly not as efficient as domestic pigs, so raising dogs as food doesn't really make sense)
I wonder if there is calculations where dogs would fall on axis of chicken, pork and beef. Probably around pork, but which side and what sort of diets would be allowable.
I think that is just because we haven't served it to them. Serve it a few years and then tell what it is. Could solve that issue. Also I wonder how well decent breed of dog compares to beef, chicken and pork from ecological and economic perspective.
Only animals I'm against eating is hominids like apes, monkeys and humans. And that is only because of pathogens.
Technically, Soylent Green was made of people (the plot of the movie). The premise of it though was Soylent (Blue, Yellow,...) foods were (supposed to have been) made from vegetable and seaweed protein -- which is not so much science fiction anymore w.r.t. Beyond Meat and other such products.