Except for the westerners who disagree with this. They can be subjugated.
The only exception I'm aware of is India and since that's religious it seems difficult to scale. Islam has animal slaughter as one of its few obligate rituals.
I personally don't feel shame in eating animals bread to be eaten. Having had grandparents practicing subsistence farming, also being born in Eastern Europe during communism and thus suffering from food shortages, from a young age I've seen chickens, pigs and lambs being slaughtered. Not a big deal, and in an environment in which food is in short supply, killing an animal for food is a reason for celebration.
People say that we've been desensitized due to being disconnected from our food source. But I think that's backwards. You rarely see vegans among subsistence farmers. Even when meat is a luxury, eggs and dairy are staple foods.
Unless there's a massive economic incentive for stopping meat production, no country will ever get "on board" with not eating meat.
The CO2 emissions story is the only argument that has any legs. But if you think about it, it's an argument for efficiency and for taxing CO2 emissions, with plenty of low hanging fruits, e.g. we should waste less food, prefer chickens and pigs over ruminants, etc.
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Note I'm actually a vegan 3 days per week out of 7 and I prefer to go through all periods of religious fasting, which is basically hard core veganism (no traces of animal products are acceptable) before the big holidays, e.g. Lent (I'm not religious, I just like the practice).
Meat is the most efficient protein source, per calorie, with a complete profile and unfortunately there's no equivalent unless you start taking protein extracts.
Otherwise a vegan diet is a diet in which you have to eat a lot of legumes every day (lentils, kidney beans, soy) for getting 60-80 grams of protein, an inadequate level if you're looking to maintain or build muscle and going over that is hard for me without being in a caloric surplus. Also, during vegan fasting periods I take B12, Calcium supplements and I strive to eat a varied diet.
My point is, from first hand experience, a healthy diet is pretty challenging and expensive, with or without meat and for poorer populations life is hard enough as it is.
Cultural imperialism is so last century.