I really like leather pants
Leather is just skin. Most cattle skin.
I like the texture of alligator leather
The problem is most leather is produced at a largery scale in heavy industry. Mostly cow.
Why is that a problem?
People use the skin of other creatures to make alot of stuff, Shoes, hats, jackets. We are wearing cow as our clothing.
I know, but we eat meat so it is best to use the skin too right?
Vegetarianism
Vegetarianism is the practice of abstaining from the consumption of meat (red meat, poultry, seafood, and the flesh of any other animal), and may also include abstention from by-products of animals processed for food.
Vegetarianism may be adopted for various reasons. Many people object to eating meat out of respect for sentient life. Such ethical motivations have been codified under various religious beliefs, as well as animal rights advocacy. Other motivations for vegetarianism are health-related, political, environmental, cultural,
Hide (skin)
A hide or skin is an animal skin treated for human use. 
The word "hide" is related to the German word "Haut" which means skin. The industry defines hides as "skins" of large animals "e.g". cow, buffalo; the skins refer to "skins" of smaller animals: goat, sheep, deer, pig, fish, alligator, snake, etc.
Common commercial hides include leather from cattle and other livestock animals, buckskin, alligator skin