You bet!!
Thing is, without a weapon, no human is any real match for a frightened or enraged primate of nearly any size. I knew a guy who worked with them in research, and said if one of them decided to attack you, without a weapon you were going to come out on the bad side.
He said that even if they are tame or semi-tame, we are simply not used to the kind of strength a wild animal can revert to if it gets violent.
I would shoot it. No doubt.