Suárez is generally a cheat and a twat but in South American culture negrito/rubio/moreno etc are used by everyone all the time to talk to each other. The way that covered in the UK was complete bullshit. Whether Suárez was using plausible deniability as a way of winding up Evra, and also whether you think you can transport South American culture into an Anglo-Saxon environment and pretend it's fine are different things completely. But yeah, calling people "negrito", "moreno" or a number of other words to describe someone's appearance is fine in those cultures. I have an acquaintance who insists on being called "la morena" or la "morenaza" even though I've asked for her real name. How a situation emerged where some nicknames are about skin colour while white people's tend to be about hair colour is a moot point however; one that might well be racist at its root. Sorry, as I'm sure this is old ground.
The quenelle is an anti-semitic gesture invented by an anti-semite occasionally used for other purposes. It's much more clear-cut. Its use can never be considered wholly innocent.