I've often heard the saying that an elephant never forgets, but I've never heard "forgive" attached to it, which would be the Christian part.
The forgive part I remember from Son of Tarzan towards the end. Bull elephant kills the bad guy, who was an elephant poacher and killed his mate years ago. But it makes sense that elephants are not forgiving.
As for Wilhelm, he can’t very well forgive that which Trump did not do; i.e., incite a riot. Being innocent is something that DeBlasio will never forgive Trump for, since he himself is guilty of so many things. Karma, man. His karma is, like, f@#$-ed up.