Soy production is just as culpable. Soybean production is the second largest direct source of deforesttion in brazil and most likely the largest indirect source. For the last 20 years or so new soy farming methods (which allows soy to use previously unsuitable land) have taken over land that's previously been used for cattle grazing. After soy has been used to increase land fertility it's followed by other agricultural produce such as maize.

So targeting beef in particular when one of the big drivers is animal products in general (as soybeans are used as protein for animal feed)...