What's considered terrible is killing animals when it's not needed. Nowadays we don't need to eat meat, so killing animals to eat them is not necessary for us. Animals in the wild usually can't avoid killing other animals to survive.

And there are many things that are "just life" but we still don't allow them. Like for example group rape (ducks) or eating your babies (lions). Being "just life" is not an argument that helps to decide whether something is desirable.

Humans are animals too, the difference is we evolved the capacity for guilt and projecting ourselves into the future to imagine the effects of climate change.

It's more about having the capacity to make moral choices (moral agency). Animals are not moral agents, but we are.

And veganism has nothing to do with climate change. Vegans generally have a lower carbon footprint, but it's a side effect, it's not the reason they became vegan.

Those are why I don’t eat red meat and eat vegetarian once a week. If everyone did that we wouldn’t need factory farms and we also wouldn’t need to be vegan.

Have you done the maths? If everyone ate meat at every meal except one per week, the demand for meat would actually be bigger than it currently is. That's because most of the world population currently cannot afford meat at every meal.