They can think what they want, but trees are "secular" per the courts. Which is irrelevant, they're a private company, they can do what they want. Personally, religious symbols on pop cans doesn't excite me.
Well, seeing islam getting any attention and respect from a major corporation offends and annoys me, given what that “religion” teaches re: women, slavery, etc, so I am relieved that I no longer drink coke : Saves me the trouble of having to cut it out of my life.