Life is impossible without suffering. No advanced neural system functions without pain. That's the price for evolution.
Making all people to give up meat-eating is as easy as making the lion to lie down with the lamb, both chewing grass.
We should accept the meat-eating people as well as we accept the carnivores (including cats & dogs, whose dried food is made from living creatures, too! But we love those 'passive killers')
Btw the vegans' love of animals is often mixed with anthropomorphism.
Everybody loves cute calves, piglets and chickens - some loves them alive only, some loves them both alive and cooked.
Now, let's imagine that in future a technology will be created to make a meat substitute from invertebrates (such as locust or mealworms), so no mammals or birds or fish will be killed for food. Along with certain proof that invertebrates actually feel pain.
How many protectors the poor, mistreated 'bugs' will find then, without big appealing eyes, without fur or feathers?
A different, less possible situation: if the farm animals' life will get better (equal to a good zoo), but they will be instantly killed at the end (less than a second of suffering), will it justify meat-eating? Or killing anything is always bad?
We kill millions of bacteria every day, when washing hands. And they suffer in their own way. For our benefit.