I realize that Jaguars are different but why is it a bad thing if they are put in a part of the country where big cats already live and thrive? Grizzles and Black bears live in the same habitat and there are big cats living there as well.
Did you look at the map of the critical habitat recommendations? Ever heard of the towns in or near that area? Jaguars aren't mountain lions, they are more like african lions, no fear, a real apex predator like man. Add to that mix around a lot of people, not much game if they get established, and welcome to people getting killed on a regular basis. This same area has other species that are being re-established. What do yo think will happen to those species if the Jag gets back even to the level of mountain lions? Do you live where the gov't put wolves back? There is a reason they were hunted out, and it is just a valid today.
As xone indicated the jaguar is THE apex predator after grizzlies, in this hemisphere. There isn’t a single animal predator in its range that preys upon it with the potential for a “natural” balance.
Now, what do you suppose a fearless 200 lb carnivore has its menu? What critter exists in size and abundance to feed that hunger. Jack rabbits? While they are thought to be generally territorial ( in Brazil to such an extent that having found a cattle herd they protect it against all, including the cowboys and their dogs) paucity of food will lead them to rove past the magic government lines.
Hint, jaguars aren’t Whole Food shoppers, and unlike grizzlies they don’t eat berries.