Its not the animals stomach acids that break down the organs. It doesn't take place in the stomach at all. This is something that animals do to survive. For instance when you eat less your fat doesn't go to your stomach to keep you going.
People may not agree with the science but in the end its going to happen and we all benefit from it. Look up "dog head transplant." When you are all done freaking out about how cruel and awful that was, think about how experiments like that are what allowed for heart transplants, valve replacements, and limb reattachments. You have no idea how the science will help. In the end I don't believe the amount of time the snakes were deprived of food raises to the level of cruelty and the animals were euthanized before being blended. We all kill or support businesses that kill around 60 or more mammals a year per snake. We raise countless more animals to eat ourselves, for our other pets to eat, and for the products we use. 60 snakes for science isn't even a blip on my radar.