You might want to actually read that wikipedia post.....
"The slang term Guido is used in American culture to refer derogatorily to an urban working-class Italian or Italian-American male who is overly aggressive or macho with a tendency for certain conspicuous behavior.[3] It may also be used as a more general ethnic slur for working-class urban Italian Americans.[4]"
Okay? Strawman much? I'm not arguing that anyone do anything about it. I'm just telling you objectively what it is. The Wikipedia article YOU cited disagrees with you...
"The slang term Guido is used in American culture to refer derogatorily to an urban working-class Italian or Italian-American male who is overly aggressive or macho with a tendency for certain conspicuous behavior.[3] It may also be used as a more general ethnic slur for working-class urban Italian Americans.[4]"