I don't see the problem at all.
1.) It's a sculpture, no different from one in bronze or plaster. Chocolate's just a medium.
2.) You can eat a chocolate egg to symbolise the rising, but you can't make a chocolate sculpture of the man himself?
3.) Easter seems to best time to make such a thing.
4.) So he hasn't got a loincloth. Who says he had anything on on the cross?
And here's an image - it seems to be quite a sensitive piece that a lot of skill and time went into. Granted, it's not particularly pretty, but I would imagine crucifictions generally aren't: