Even though Bolsonaro is a stupid animal, his policies wrt the Amazon are only the result of capitalist thinking, which is the standard way of western society. So much so that he has strong support from the rich in Brazil and in other countries as well.
The reason Amazon is being deforested is simple: is not that they hate the Amazon and want to destroy it. Is that doing this is very profitable. You get FREE land to raise cattle and grow soy. You can get rich(er) from day to night. With that money you buy your way with politicians, both in Brazil (easy) as well as in other countries who will turn a blind eye on this. And its not only people in Amazon getting rich, Americans are buying like crazy into the cheaper meat, wood, and soy. And Americans will find this great, because now you can get "hormone-free beef", cheap "earth-saving" soy products, and beautiful, cheap wood products. People in America peddling these products are getting rich and telling everyone that they're making their lives "better". This is what capitalist society calls a "win-win".
The problem there is that making more money is not good to everyone as they want us to believe, and in particular not good for the environment, or to the thousands of native people who will die or be dislodged from their native land, or to the several thousand people that will have to toil on land stolen by others. There is no way capitalism can prevent this, because it only benefits a certain part of society that decided to live under its auspices (most of them in rich countries) - Brazilians making cents per day have close to zero power in the market. Making more money is not good for the workers that will be squeezed for this profit to happen. It is not good for the kids that will grow without education because their families are forced to participate in this process. In other words, making more money does not solve problems, it only create more problems, even if these problems are going somewhere you cannot see or care about. The world needs to break this vicious cycle of money making before we can find a solution to these grave problems that cannot be controlled under capitalism.