You’ve been fed meat propaganda for much longer than environmental propaganda.
I like meat and I do not give a fuck about environment. Earth can burn, with all the people on it, for all I care.
It’s not propaganda, it’s objectively delicious and the best tasting (and hugely nutritious) food for people. My kid vastly prefers steak to ground beef or chicken.
"Propaganda" to encourage people to make other types of healthy choices like eating healthier, eating more fruits/veggies, etc are not nearly as effective, even on impressionable youth