It is racist lads, sorry to break it to you.
Highlighting and focusing on black people's physical attributes is a thing that's dated back to slavery.
The people involved in this chant possibly weren't intending to be malicious, and it's more of an ignorance thing, which we're all guilty of or have been guilty of. But then people probably need to educate themselves a bit more.
Also, if you use the word 'snowflake' without any hint of irony, there's a strong likelihood that you're a bit of a cunt.