Not to re-hash what everybody else has said, but I don't see what is so special about the sweater in the first place, besides that it has the Gucci monogram all over it? It's not particularly innovative, either in cut, style, etc. To be honest, it DOES look like the myriad of fake goods produced all over the street (as somebody else said).
I actually quite like Gucci, in general, especially when it sticks to design and not to logo-smattering. Gucci can produce a gorgeous sweater from time to time (I'm especially thinking of the white cashmere job from A/W 2002 or thereabouts that was the most expensive sweater they every produced... nearly $2700, because of the complexity of the design and production... and it had not a single "G" or logo on it). But, this one? I guess the fact that it has the Gucci monogram makes it "sick?"
And, as for Diesels... eh... who cares?