This is first time to see such case on the edits review queue. A 1'rep user wrote an offensive comment as an edit of a different user answer (as it could be a question).
Well, I could reject it for different reasons: Invalid edit (Attend to be a comment), Vandalism (Spam) or Custom. I preferred to write a custom message: personal & offensive comment made as an edit.
What should I choose in such case?
Because I thought that was a wrong choice, may be better if I choose Spam. Ideally, If there some options like comment flags. The user could get a warning (or his account will be suspended) for that, similar to writing comments.
As I did, The user will go with an untracked crime/offense and he can do that again and again.
Note: May be I'm not aware if there are some mod tools that catch such case.