I would agree that evolution is a theory, built upon evidence (e.g. bones and fossils) and the interpretation of that evidence by various scientists.
To embrace one interpretation over another requires belief.
So yes, evolution is a belief.
"To embrace one interpretation over another requires belief."
No, it isn't. You give a contorted definition of belief. By your logic, accepting genetics over pangenesis is a belief, accepting the Big Bang theory over steady-state theory is a belief, and accepting the Alvarez theory over gradualistic extinction is a belief. These aren't beliefs; they're simply theories with the most evidence and the most accurate explanation for the current data.