From BBC News:
Campaigners want the US government to act against "Meet The Flockers" by the west coast rapper YG, which takes the form of a guide on how to commit a burglary. They say the song acts as a "step-by-step blueprint and encourages even more criminals to target Chinese families".
In particular they have highlighted the opening line of the song: "First, you find a house and scope it out. Find a Chinese neighbourhood, cause they don't believe in bank accounts."
Although the track was released in 2014, the controversy over the lyrics has flared up only in recent weeks, and has resulted in several shows on YG's current tour being picketed by protesters.