How do you define racism? Can a BuzzFeed community post be racist?

Months ago, I posted my first article to BuzzFeed. Since then, I’ve been labelled a racist. My questions: Can a BuzzFeed community article be racist, even if that isn’t the intent? Do you believe my article is racist? Should I give in to those who’ve asked for my post to be amended or deleted?

(I’ve asked the same question on Quora, but I’m seeking a wide cross section of answers).