Phrases and insults only becone RACIST when we label them, so. If you had grown up in NYC in 1955, all of the neighborhoods were segregated, and each ethnicity referred to other ethnicities via racial slurs - it was commonplace, and it wasn't intended to be malicious. It was just a label. Today everyone is demanding a Utopia be established, and it's just not going to happen. It can't exist because there's no such thing. Even outside of the human condition, Nature segregates different groups within the same species into families, pods, etc.
So, if your feelings get hurt by something that a poster types, then IGNORE IT, and move along. Be the better person and feel sorry for them that their lives are that empty that they are compelled to hurl such insults. Let it go. Your heart will thank you, your blood pressure will thank you, and your friends and family will hail you a "Hero" for taking the high road and letting it roll off like water on wax paper.