I agree that targeting tiny amounts doesn't work - but I don't think your source supports the idea that raising livestock is a tiny amount. It quotes the amount

I agree that targeting tiny amounts doesn't work - but I don't think your source supports the idea that raising livestock is a tiny amount. It quotes the amount for "Agriculture, Forestry, and Other Land Use" at 22% and describes it as "Greenhouse gas emissions from this sector come mostly from agriculture (cultivation of crops and livestock) and deforestation".