and Brasillians will have nothing to sell to us

What about the cool carnival hats??

Brazil is the largest soybean producer in the world.

Which… is largely fed to our livestock?

If you want less rainforest torn down to grow soybeans, eat more soybeans.

Soybeans aren't just good for food, they can be turned into fuel and plastics.

I believe you are misinformed. Brazil is the top exporter in the world of several agricultural products and metals. Beef is not even in the top 10 exports from Brazil to the US.

https://tradingeconomics.com/brazil/exports/united-states

No, there is no better protein

You could use Quorn instead and just eat more of it. It has less protein by weight, but more for the same number of calories. Also beans are very good.

Protein quality only matters if you’re not getting enough protein.

Here’s some good discussion you should read https://www.barbellmedicine.com/blog/barbell-medicine-protei...

That doesn't sound like a solution, and it is not attainable at all unless we are talking about thousands upon thousands of years. Meat is culturally important, and only a small percentage of the global population is willing to give up on it.

PS: When you talk about mammals only, are you still pro-consumption of fish and avians?

No, I think fish and avians should be avoided for consumption as well but the article is about beef and we need to start somewhere. Cows are sentient emotional social animals as we are.