Rob $tone has been engaging in a bitter fued with XXXTENTACION & Ski Mask The Slump God for a while now. It more or less popped off during Desiigner's Outlet Tour, which culminated in Rob $tone and his crew jumping Ski Mask while on stage. After that, both acts were dropped from the tour and threats continued to fly from all involved parties. 

Unfortunately for Rob $tone, the beef has led to him being dropped from the massive hip-hop festival Rolling Loud. To add insult to injury, $tone's slot was filled by none other than his bitter rival Ski Mask The Slump God. $tone has since responded to the move on an Instagram live session, in which he sheds a bit of light on the situation (when he's not busy flaunting his diamonds). It's clear that $tone is not ready to squash the beef, concluding his video with a new bout of threats toward XXXTENTACION. 

For those who don't have access to video (provided by DJ Akademiks), this tweet from $tone is a pretty good summary.