Soulja Boy Threatens to Kill Ex-Girlfriend and Her New Boyfriend

Soulja Boy is making disturbing threats to kill his ex-girlfriend and her new boyfriend.

The “Crank That” rapper made the vicious threat Friday in a video post … waving and pointing what appears to be a Glock with an extended magazine.

It’s unclear why the threat’s being directed at Nia Riley and her BF. Not the smartest move — especially considering Soulja’s on probation for a weapons charge. Watch the video and continue reading at TMZ…