Cows or humans whos the bigger environmental burden?

Tristram Coffin makes validated claims on the environmental impact associated with raising extensive amounts of cattle, but are his environmental claims alone enough to battle the beef industry and win? Coffin wants cattle to cease being consumed, but many of the points that Coffin makes are only attacks on the industrial management of cattle. For example, Coffin states that over grazing and overuse of the land has led to desertification and deforestation. He goes on to state that the main cause of desertification is “overgrazing of livestock, over cultivation of land, improper irrigation techniques, deforestation.” Every one of these resulted from land mismanagement by the human race. Humans control the number of cattle in a given space, so they regulate herd density and ultimately the amount of land being grazed.
Coffin faults cows for their methane emissions. Cows, like other animals, including humans, have digestive byproducts of methane gas. The story is much the same for termites. Termites are responsible for at least 1/5 of the biomass on this planet. Estimates state that Termites contribute just as much, if not more, methane to the environment as cattle; 1.5 x 1014 grams (1.5 Million tons) or 30% of total atmospheric methane. Let us look at the world in the absence of human farming. We will call it planet Y. The earth is covered in forests and diversity in the animal kingdom is high. Trees are constantly falling and new are growing. Animals are eating their bounty and living without the fear of humans. Here we have a dense forest which is covering at least half of the deserts and farmlands of our current planet. Since these forests cover about 1.5 times as much land as current forests do, 1.5 times more wood and plant biomass must be decomposed. Thus, the termite population is also 1.5 times as large as planet Earth’s termite population. Termites, therefore, are responsible for releasing up to 45% of total atmospheric composition. Also, planet Y has many more animals (as a result from absence of deforestation and desertification) and, as was noted before, these animals will also have an atmospheric methane contribution. The contribution may be small on an individual level, but may account for a great deal when amassed. Here we arrive at a very low estimate that 20% contribution of atmospheric methane comes from extra termites (15%) and extra animals (5%). On planet earth, cattle account for this missing 20% methane that is seen on planet Y. Therefore, the niche which cattle now occupy was the niche which once belonged to the termites and animals that humans have already removed from the planet through deforestation and desertification. Who is the bigger burden; the humans allowing all the above to go with minimal check or the cows who only do what is needed to survive?