Stop focusing on things you can't change (even tho they make you look good/moral) and start focusing on results.
If all the energy used to try and convince people to not eat meat (something that can't even theoretically happen) had instead been focused on lobbing for systemic support for development of artificial meat ... we would have already had it. Then no one would have to give up meat. Most people have no connection to the animal as is - if the messaging is done right, most will not care, especially if it's seen as "better, cheaper and healthier".
But for that, someone would have to start a massive pan-EU campaign to start devoting billions into research and commercialization of artificial meat. I would support such a (vegan) candidate.
I eat meat, but I would much prefer if there was no suffering attached to it.