For me, personally, I agree that the industrial meat industry is unethical and has to go. My push-back against the herbivore claims is purely from an objective standpoint. Putting aside objectivism, if humans are omnivores, it makes the moral argument stronger. You'd be telling people they have a choice and can choose to eat a more compassionate and ethical diet. (More energy efficient, too.) If people are herbivores, you get stuck in this weird argument about what humans are supposed to do instead of what we can choose to do.

I spent a lot of time as a vegan, and talked about my choices openly. (Stopped on account of health.) No one attacked me for them and it was because I stuck to irrefutable facts and never made the person I was talking to feel bad for their choices. I just showed them they could easily be a better human, if they wanted to be. Maybe that doesn't feel like enough for you, but I felt that no one ever changed their position on a personal matter because someone else made them feel attacked. They always dig in their heels.

Gorillas are omnivores.
Pandas are ex-carnivores who've transitioned to a specialized herbivore diet over millions of years of evolution do to environmental factors. Additionally, you realize bamboo has a shit ton of protein and carbohydrate in a ratio similar to a hypercarnivores diet, right? That's how they were able to transition in the first place, Pandas digestive system and gut microbiome still resemble carnivores, they're not typical herbivores. In fact pandas have been known to occasionally snack on meat and consume small animals or carrion, aligning them as super picky omnivores.
And PANDAS DO NOT HAVE HANDS, not a single fucking species of bear has hands. They have specialized paws with pseudo-thumbs which is actually a modified wrist bone to grip and eat bamboo, not true hands.
Similar to Panda's, Koalas have specialized paws with curved claws adapted for gripping and climbing trees, not hands.

At least you got 1 thing right, Gorilla's have hands.