I don't understand veganism enough to speak about it and don't care enough to look into it. I'll take your word for it though.

Meat production is in the single digits in actual global pollution. The problem isn't our diet. The problem is the fossil fuel industry which contributes to 79+% of the world's pollution. If I had a light switch that can turn off all meat production, nothing would change. If I did the same for fossil fuels, it would instantly stop climate change.

Focus on who the enemy is here. It's not us, the people. It's the fossil fuel industry. Demand change from your government. We need clean energy from things like nuclear, solar, wind and whatever new innovation comes from government investments.

https://www.wri.org/insights/interactive-chart-shows-changes-worlds-top-10-emitters#:~:text=Since%20reporting%20began%20in%201990%2C%20the%20energy%20sector,sector%2C%20representing%2076%25%20of%20global%20emissions%20in%202019.